"Fix" NPE in PhoneStatusBarPolicy

Callback returns a copy of the list
Makes PrivacyItemController dumpable

Test: atest
Test: adb shell dumpsys activity service com.android.systemui/.SystemUIService Dependency
Fixes: 124234367

Change-Id: I1400ee8294f34b129723bb0f0ce7745dafaf5545
diff --git a/packages/SystemUI/src/com/android/systemui/privacy/PrivacyItem.kt b/packages/SystemUI/src/com/android/systemui/privacy/PrivacyItem.kt
index f7ca51d..a6e48f8 100644
--- a/packages/SystemUI/src/com/android/systemui/privacy/PrivacyItem.kt
+++ b/packages/SystemUI/src/com/android/systemui/privacy/PrivacyItem.kt
@@ -62,4 +62,6 @@
             context.packageManager.getApplicationLabel(it) as String
         } ?: packageName
     }
+
+    override fun toString() = "PrivacyApplication(packageName=$packageName, uid=$uid)"
 }
diff --git a/packages/SystemUI/src/com/android/systemui/privacy/PrivacyItemController.kt b/packages/SystemUI/src/com/android/systemui/privacy/PrivacyItemController.kt
index 0f33937..625eacd 100644
--- a/packages/SystemUI/src/com/android/systemui/privacy/PrivacyItemController.kt
+++ b/packages/SystemUI/src/com/android/systemui/privacy/PrivacyItemController.kt
@@ -31,6 +31,9 @@
 import com.android.systemui.R
 import com.android.systemui.appops.AppOpItem
 import com.android.systemui.appops.AppOpsController
+import com.android.systemui.Dumpable
+import java.io.FileDescriptor
+import java.io.PrintWriter
 import java.lang.ref.WeakReference
 import javax.inject.Inject
 import javax.inject.Named
@@ -42,7 +45,7 @@
         private val appOpsController: AppOpsController,
         @Named(MAIN_HANDLER_NAME) private val uiHandler: Handler,
         @Named(BG_HANDLER_NAME) private val bgHandler: Handler
-) {
+) : Dumpable {
 
     companion object {
         val OPS = intArrayOf(AppOpsManager.OP_CAMERA,
@@ -56,7 +59,10 @@
         const val SYSTEM_UID = 1000
     }
 
-    private var privacyList = emptyList<PrivacyItem>()
+    @VisibleForTesting
+    internal var privacyList = emptyList<PrivacyItem>()
+        get() = field.toList() // Provides a shallow copy of the list
+
     private val userManager = context.getSystemService(UserManager::class.java)
     private var currentUserIds = emptyList<Int>()
     private var listening = false
@@ -189,4 +195,22 @@
             callback?.privacyChanged(list)
         }
     }
+
+    override fun dump(fd: FileDescriptor?, pw: PrintWriter?, args: Array<out String>?) {
+        pw?.println("PrivacyItemController state:")
+        pw?.println("  Listening: $listening")
+        pw?.println("  Current user ids: $currentUserIds")
+        pw?.println("  Privacy Items:")
+        privacyList.forEach {
+            pw?.print("    ")
+            pw?.println(it.toString())
+        }
+        pw?.println("  Callbacks:")
+        callbacks.forEach {
+            it.get()?.let {
+                pw?.print("    ")
+                pw?.println(it.toString())
+            }
+        }
+    }
 }
\ No newline at end of file
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarPolicy.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarPolicy.java
index 2799191..e0c5e59 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarPolicy.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarPolicy.java
@@ -92,6 +92,8 @@
 import com.android.systemui.statusbar.policy.ZenModeController;
 import com.android.systemui.util.NotificationChannels;
 
+import java.io.PrintWriter;
+import java.io.StringWriter;
 import java.util.List;
 import java.util.Locale;
 
@@ -793,6 +795,15 @@
         boolean showMicrophone = false;
         boolean showLocation = false;
         for (PrivacyItem item : items) {
+            if (item == null /* b/124234367 */) {
+                if (DEBUG) {
+                    Log.e(TAG, "updatePrivacyItems - null item found");
+                    StringWriter out = new StringWriter();
+                    mPrivacyItemController.dump(null, new PrintWriter(out), null);
+                    Log.e(TAG, out.toString());
+                }
+                continue;
+            }
             switch (item.getPrivacyType()) {
                 case TYPE_CAMERA:
                     showCamera = true;