Merge "Use SOURCE_CLASS_POINTER as the default source for MotionEvent" into sc-v2-dev am: 72e278d976

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16432384

Change-Id: I7916149c7abb1e940558383155e2b4cca3a88f2e