SystemUI: Fix display cutout handling in expanding volume panel

Devices with display cutouts in the status bar area usually have a
taller status bar to accomodate them. The custom volume panel dialog
insets don't account for that when using the location of the dialog,
resulting in incorrect insets that block touch at the top edge of the
volume panel.

Custom insets are unnecessary anyway, especially when they just return a
rectangle encompassing the entire visible region of the volume panel, so
remove the custom inset code to fix the display cutout handling issue.

Collapsed volume controls aren't touchable regardless of insets because
they're inside the collapsed container.

Change-Id: I6b8f2f796a99c7d28c0660988e208a5d831379b6

Author: kdrag0n

packages/SystemUI/src/com/android/systemui/volume/VolumeDialogImpl.java

@@ -81,9 +81,6 @@
 import android.view.ViewGroup;
 import android.view.ViewPropertyAnimator;
 import android.view.ViewStub;
-import android.view.ViewTreeObserver;
-import android.view.ViewTreeObserver.InternalInsetsInfo;
-import android.view.ViewTreeObserver.OnComputeInternalInsetsListener;
 import android.view.Window;
 import android.view.WindowManager;
 import android.view.accessibility.AccessibilityEvent;
@@ -348,22 +345,6 @@ private void initDialog() {
         mMusicHidden = false;
     }
 
-    private final OnComputeInternalInsetsListener mInsetsListener = internalInsetsInfo -> {
-        internalInsetsInfo.touchableRegion.setEmpty();
-        internalInsetsInfo.setTouchableInsets(InternalInsetsInfo.TOUCHABLE_INSETS_REGION);
-        View main = mDialog.findViewById(R.id.main);
-        int[] mainLocation = new int[2];
-        main.getLocationOnScreen(mainLocation);
-        int[] dialogLocation = new int[2];
-        mDialogView.getLocationOnScreen(dialogLocation);
-        internalInsetsInfo.touchableRegion.set(new Region(
-                mainLocation[0],
-                dialogLocation[1],
-                mainLocation[0] + main.getWidth(),
-                dialogLocation[1] + mDialogView.getHeight()
-        ));
-    };
-
     // Helper to set layout gravity.
     // Particular useful when the ViewGroup in question
     // is different for portait vs landscape.
@@ -835,7 +816,6 @@ private void showH(int reason) {
 
         initSettingsH();
         mIsAnimatingDismiss = false;
-        mDialog.getViewTreeObserver().addOnComputeInternalInsetsListener(mInsetsListener);
 
         if (!mShowing && !mDialog.isShown()) {
             if (!isLandscape()) {