Volume: Force focused state to disambig multiple sliders.

And fix volume policy so that a focused slider at the top
of the screen does not cause the window to pan.

Bug: 21476764
Change-Id: I4a52270ca5ecf9b9bd6e787ef580ecbd32e62625
diff --git a/services/core/java/com/android/server/policy/PhoneWindowManager.java b/services/core/java/com/android/server/policy/PhoneWindowManager.java
index 6fb9a5c..79fe29b 100644
--- a/services/core/java/com/android/server/policy/PhoneWindowManager.java
+++ b/services/core/java/com/android/server/policy/PhoneWindowManager.java
@@ -3918,7 +3918,8 @@
                 // A window that has requested to fill the entire screen just
                 // gets everything, period.
                 if (attrs.type == TYPE_STATUS_BAR_PANEL
-                        || attrs.type == TYPE_STATUS_BAR_SUB_PANEL) {
+                        || attrs.type == TYPE_STATUS_BAR_SUB_PANEL
+                        || attrs.type == TYPE_VOLUME_OVERLAY) {
                     pf.left = df.left = of.left = cf.left = hasNavBar
                             ? mDockLeft : mUnrestrictedScreenLeft;
                     pf.top = df.top = of.top = cf.top = mUnrestrictedScreenTop;
@@ -4033,9 +4034,9 @@
                         "): normal window");
                 // Otherwise, a normal window must be placed inside the content
                 // of all screen decorations.
-                if (attrs.type == TYPE_STATUS_BAR_PANEL) {
-                    // Status bar panels are the only windows who can go on top of
-                    // the status bar.  They are protected by the STATUS_BAR_SERVICE
+                if (attrs.type == TYPE_STATUS_BAR_PANEL || attrs.type == TYPE_VOLUME_OVERLAY) {
+                    // Status bar panels and the volume dialog are the only windows who can go on
+                    // top of the status bar.  They are protected by the STATUS_BAR_SERVICE
                     // permission, so they have the same privileges as the status
                     // bar itself.
                     pf.left = df.left = of.left = cf.left = mRestrictedScreenLeft;
@@ -4044,8 +4045,7 @@
                             + mRestrictedScreenWidth;
                     pf.bottom = df.bottom = of.bottom = cf.bottom = mRestrictedScreenTop
                             + mRestrictedScreenHeight;
-                } else if (attrs.type == TYPE_TOAST || attrs.type == TYPE_SYSTEM_ALERT
-                        || attrs.type == TYPE_VOLUME_OVERLAY) {
+                } else if (attrs.type == TYPE_TOAST || attrs.type == TYPE_SYSTEM_ALERT) {
                     // These dialogs are stable to interim decor changes.
                     pf.left = df.left = of.left = cf.left = mStableLeft;
                     pf.top = df.top = of.top = cf.top = mStableTop;