Merge "Ignore additional pointers in dispatchTouchEvent." into rvc-dev am: fe71adaa am: 20871998 am: e9c1165d am: a72c99e4

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12049282

Change-Id: I6ee496e3fc301a4a0ab00d93aa2911ab38d99d7f