PiP: Disable corner resizing.

This is done by disabling all the trigger points (the 4 corners). Will
hold off on removing the entire code until later in case needed.

Bug: 179299163
Test: Manual. Dragging from the corner no longer works
Change-Id: I4ed931245cbb49647feeff8b37174f6502fe9c5e

libs/WindowManager/Shell/res/values/config.xml

@@ -30,6 +30,9 @@
     <!-- Allow PIP to resize to a slightly bigger state upon touch/showing the menu -->
     <bool name="config_pipEnableResizeForMenu">true</bool>
 
+    <!-- Allow PIP to resize via dragging the corner of PiP. -->
+    <bool name="config_pipEnableDragCornerResize">false</bool>
+
     <!-- Allow PIP to enable round corner, see also R.dimen.pip_corner_radius -->
     <bool name="config_pipEnableRoundCorner">false</bool>
 

libs/WindowManager/Shell/src/com/android/wm/shell/pip/phone/PipResizeGestureHandler.java

@@ -103,6 +103,7 @@ public class PipResizeGestureHandler {
     private boolean mIsAttached;
     private boolean mIsEnabled;
     private boolean mEnablePinchResize;
+    private boolean mEnableDragCornerResize;
     private boolean mIsSysUiStateValid;
     private boolean mThresholdCrossed;
     private boolean mOngoingPinchToResize = false;
@@ -174,6 +175,7 @@ public class PipResizeGestureHandler {
     private void reloadResources() {
         final Resources res = mContext.getResources();
         mDelta = res.getDimensionPixelSize(R.dimen.pip_resize_edge_size);
+        mEnableDragCornerResize = res.getBoolean(R.bool.config_pipEnableDragCornerResize);
         mTouchSlop = ViewConfiguration.get(mContext).getScaledTouchSlop();
     }
 
@@ -267,6 +269,10 @@ public class PipResizeGestureHandler {
      * |_|_|         |_|_|
      */
     public boolean isWithinDragResizeRegion(int x, int y) {
+        if (!mEnableDragCornerResize) {
+            return false;
+        }
+
         final Rect currentPipBounds = mPipBoundsState.getBounds();
         if (currentPipBounds == null) {
             return false;