Rename system-api wm flags to SYSTEM_...

Also add a special API to set them. Internally they are still just
regular private flags

Test: Built
Bug: 116798569
Change-Id: I687b751fa18c7fbcc9bf95aa44d94d8a5614a88f
diff --git a/api/system-current.txt b/api/system-current.txt
index 30a0c85..9390705 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -6654,7 +6654,7 @@
 package android.view {
 
   public abstract class Window {
-    method public void addPrivateFlags(int);
+    method public void addSystemFlags(int);
   }
 
   public abstract interface WindowManager implements android.view.ViewManager {
@@ -6664,7 +6664,10 @@
   public static class WindowManager.LayoutParams extends android.view.ViewGroup.LayoutParams implements android.os.Parcelable {
     method public final long getUserActivityTimeout();
     method public final void setUserActivityTimeout(long);
-    field public static final int PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS = 524288; // 0x80000
+    field public static final int SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS = 524288; // 0x80000
+  }
+
+  public static abstract class WindowManager.LayoutParams.SystemFlags implements java.lang.annotation.Annotation {
   }
 
 }
diff --git a/core/java/android/view/Window.java b/core/java/android/view/Window.java
index 982737a..c1e94d8 100644
--- a/core/java/android/view/Window.java
+++ b/core/java/android/view/Window.java
@@ -1085,6 +1085,19 @@
      *
      * <p>Refer to the individual flags for the permissions needed.
      *
+     * @param flags The flag bits to add.
+     *
+     * @hide
+     */
+    public void addPrivateFlags(int flags) {
+        setPrivateFlags(flags, flags);
+    }
+
+    /**
+     * Add system flag bits.
+     *
+     * <p>Refer to the individual flags for the permissions needed.
+     *
      * <p>Note: Only for updateable system components (aka. mainline modules)
      *
      * @param flags The flag bits to add.
@@ -1092,8 +1105,8 @@
      * @hide
      */
     @SystemApi
-    public void addPrivateFlags(int flags) {
-        setPrivateFlags(flags, flags);
+    public void addSystemFlags(@WindowManager.LayoutParams.SystemFlags int flags) {
+        addPrivateFlags(flags);
     }
 
     /**
diff --git a/core/java/android/view/WindowManager.java b/core/java/android/view/WindowManager.java
index 742df5e8..2d77cb4 100644
--- a/core/java/android/view/WindowManager.java
+++ b/core/java/android/view/WindowManager.java
@@ -1670,7 +1670,7 @@
          */
         @SystemApi
         @RequiresPermission(permission.HIDE_NON_SYSTEM_OVERLAY_WINDOWS)
-        public static final int PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS = 0x00080000;
+        public static final int SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS = 0x00080000;
 
         /**
          * Indicates that this window is the rounded corners overlay present on some
@@ -1708,6 +1708,18 @@
         public static final int PRIVATE_FLAG_STATUS_FORCE_SHOW_NAVIGATION = 0x00800000;
 
         /**
+         * An internal annotation for flags that can be specified to {@link #softInputMode}.
+         *
+         * @hide
+         */
+        @SystemApi
+        @Retention(RetentionPolicy.SOURCE)
+        @IntDef(flag = true, prefix = { "SYSTEM_FLAG_" }, value = {
+                SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS,
+        })
+        public @interface SystemFlags {}
+
+        /**
          * Control flags that are private to the platform.
          * @hide
          */
@@ -1781,8 +1793,8 @@
                         equals = PRIVATE_FLAG_SUSTAINED_PERFORMANCE_MODE,
                         name = "SUSTAINED_PERFORMANCE_MODE"),
                 @ViewDebug.FlagToString(
-                        mask = PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS,
-                        equals = PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS,
+                        mask = SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS,
+                        equals = SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS,
                         name = "HIDE_NON_SYSTEM_OVERLAY_WINDOWS"),
                 @ViewDebug.FlagToString(
                         mask = PRIVATE_FLAG_IS_ROUNDED_CORNERS_OVERLAY,
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index f3f012d..8ba60f5 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -2748,7 +2748,7 @@
         android:protectionLevel="signature" />
 
     <!-- @SystemApi Allows an application to use
-         {@link android.view.WindowManager.LayoutsParams#PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS}
+         {@link android.view.WindowManager.LayoutsParams#SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS}
          to hide non-system-overlay windows.
          <p>Not for use by third-party applications.
          @hide
diff --git a/packages/PackageInstaller/src/com/android/packageinstaller/PackageInstallerActivity.java b/packages/PackageInstaller/src/com/android/packageinstaller/PackageInstallerActivity.java
index 8c29a25..441dbac 100644
--- a/packages/PackageInstaller/src/com/android/packageinstaller/PackageInstallerActivity.java
+++ b/packages/PackageInstaller/src/com/android/packageinstaller/PackageInstallerActivity.java
@@ -16,7 +16,7 @@
 */
 package com.android.packageinstaller;
 
-import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
+import static android.view.WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
 
 import android.Manifest;
 import android.annotation.NonNull;
@@ -281,7 +281,7 @@
 
     @Override
     protected void onCreate(Bundle icicle) {
-        getWindow().addPrivateFlags(PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
+        getWindow().addSystemFlags(SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
 
         super.onCreate(null);
 
diff --git a/packages/SystemUI/src/com/android/systemui/SlicePermissionActivity.java b/packages/SystemUI/src/com/android/systemui/SlicePermissionActivity.java
index 6d79066..449ed8c 100644
--- a/packages/SystemUI/src/com/android/systemui/SlicePermissionActivity.java
+++ b/packages/SystemUI/src/com/android/systemui/SlicePermissionActivity.java
@@ -14,7 +14,7 @@
 
 package com.android.systemui;
 
-import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
+import static android.view.WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
 
 import android.app.Activity;
 import android.app.AlertDialog;
@@ -69,7 +69,7 @@
                     .setPositiveButton(R.string.slice_permission_allow, this)
                     .setOnDismissListener(this)
                     .create();
-            dialog.getWindow().addPrivateFlags(PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
+            dialog.getWindow().addSystemFlags(SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
             dialog.show();
             TextView t1 = dialog.getWindow().getDecorView().findViewById(R.id.text1);
             t1.setText(getString(R.string.slice_permission_text_1, app2));
diff --git a/packages/SystemUI/src/com/android/systemui/media/MediaProjectionPermissionActivity.java b/packages/SystemUI/src/com/android/systemui/media/MediaProjectionPermissionActivity.java
index 4a67868..df76315 100644
--- a/packages/SystemUI/src/com/android/systemui/media/MediaProjectionPermissionActivity.java
+++ b/packages/SystemUI/src/com/android/systemui/media/MediaProjectionPermissionActivity.java
@@ -16,7 +16,7 @@
 
 package com.android.systemui.media;
 
-import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
+import static android.view.WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
 
 import android.app.Activity;
 import android.app.AlertDialog;
@@ -151,7 +151,7 @@
         ((CheckBox) mDialog.findViewById(R.id.remember)).setOnCheckedChangeListener(this);
         final Window w = mDialog.getWindow();
         w.setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
-        w.addPrivateFlags(PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
+        w.addSystemFlags(SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
 
         mDialog.show();
     }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarWindowController.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarWindowController.java
index 57c7e28..0d37b55 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarWindowController.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarWindowController.java
@@ -173,9 +173,9 @@
         }
 
         if (state.dozing) {
-            mLpChanged.privateFlags |= LayoutParams.PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
+            mLpChanged.privateFlags |= LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
         } else {
-            mLpChanged.privateFlags &= ~LayoutParams.PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
+            mLpChanged.privateFlags &= ~LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
         }
     }
 
diff --git a/packages/SystemUI/src/com/android/systemui/usb/UsbDebuggingActivity.java b/packages/SystemUI/src/com/android/systemui/usb/UsbDebuggingActivity.java
index 66d5ee1..4102e63 100644
--- a/packages/SystemUI/src/com/android/systemui/usb/UsbDebuggingActivity.java
+++ b/packages/SystemUI/src/com/android/systemui/usb/UsbDebuggingActivity.java
@@ -54,7 +54,7 @@
     @Override
     public void onCreate(Bundle icicle) {
         Window window = getWindow();
-        window.addPrivateFlags(WindowManager.LayoutParams.PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
+        window.addSystemFlags(WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
         window.setType(WindowManager.LayoutParams.TYPE_SYSTEM_DIALOG);
 
         super.onCreate(icicle);
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/StatusBarWindowControllerTest.java b/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/StatusBarWindowControllerTest.java
index f7a7e04..de26c70 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/StatusBarWindowControllerTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/StatusBarWindowControllerTest.java
@@ -74,14 +74,14 @@
                 ArgumentCaptor.forClass(WindowManager.LayoutParams.class);
         verify(mWindowManager).updateViewLayout(any(), captor.capture());
         int flag = captor.getValue().privateFlags
-                & WindowManager.LayoutParams.PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
+                & WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
         assertThat(flag).isNotEqualTo(0);
 
         reset(mWindowManager);
         mStatusBarWindowController.setDozing(false);
         verify(mWindowManager).updateViewLayout(any(), captor.capture());
         flag = captor.getValue().privateFlags
-                & WindowManager.LayoutParams.PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
+                & WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
         assertThat(flag).isEqualTo(0);
     }
 
diff --git a/services/core/java/com/android/server/wm/WindowManagerService.java b/services/core/java/com/android/server/wm/WindowManagerService.java
index e153a1d..8b1b327 100644
--- a/services/core/java/com/android/server/wm/WindowManagerService.java
+++ b/services/core/java/com/android/server/wm/WindowManagerService.java
@@ -45,8 +45,8 @@
 import static android.view.WindowManager.LayoutParams.LAST_APPLICATION_WINDOW;
 import static android.view.WindowManager.LayoutParams.LAST_SUB_WINDOW;
 import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_COMPATIBLE_WINDOW;
-import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
 import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_IS_ROUNDED_CORNERS_OVERLAY;
+import static android.view.WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
 import static android.view.WindowManager.LayoutParams.TYPE_ACCESSIBILITY_OVERLAY;
 import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION_STARTING;
 import static android.view.WindowManager.LayoutParams.TYPE_DOCK_DIVIDER;
@@ -1928,7 +1928,7 @@
                     mAccessibilityController.onSomeWindowResizedOrMovedLocked();
                 }
 
-                if ((flagChanges & PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS) != 0) {
+                if ((flagChanges & SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS) != 0) {
                     updateNonSystemOverlayWindowsVisibilityIfNeeded(
                             win, win.mWinAnimator.getShown());
                 }
diff --git a/services/core/java/com/android/server/wm/WindowState.java b/services/core/java/com/android/server/wm/WindowState.java
index 8276952..eacbda1 100644
--- a/services/core/java/com/android/server/wm/WindowState.java
+++ b/services/core/java/com/android/server/wm/WindowState.java
@@ -46,12 +46,12 @@
 import static android.view.WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_ALWAYS;
 import static android.view.WindowManager.LayoutParams.MATCH_PARENT;
 import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_COMPATIBLE_WINDOW;
-import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
 import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_LAYOUT_CHILD_WINDOW_IN_PARENT_FRAME;
 import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_NO_MOVE_ANIMATION;
 import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_WILL_NOT_REPLACE_ON_RELAUNCH;
 import static android.view.WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE;
 import static android.view.WindowManager.LayoutParams.SOFT_INPUT_MASK_ADJUST;
+import static android.view.WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
 import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION;
 import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION_MEDIA;
 import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION_MEDIA_OVERLAY;
@@ -3470,7 +3470,7 @@
      * this window is visible.
      */
     boolean hideNonSystemOverlayWindowsWhenVisible() {
-        return (mAttrs.privateFlags & PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS) != 0
+        return (mAttrs.privateFlags & SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS) != 0
                 && mSession.mCanHideNonSystemOverlayWindows;
     }