Merge "Persist PiP size to be restored on re-entry"

core/java/android/view/IPinnedStackListener.aidl

core/java/com/android/internal/policy/PipSnapAlgorithm.java

.../systemui/shared/system/PinnedStackListenerForwarder.java

...stemUI/src/com/android/systemui/pip/PipBoundsHandler.java

...stemUI/src/com/android/systemui/pip/phone/PipManager.java

...I/src/com/android/systemui/pip/phone/PipTouchHandler.java

services/core/java/com/android/server/wm/ActivityRecord.java

...ore/java/com/android/server/wm/PinnedStackController.java