Merge "Enable persist.wm.debug.predictive_back_anim by default." into...

Merge "Enable persist.wm.debug.predictive_back_anim by default." into tm-qpr-dev am: 798eac1a am: a32ccb00

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21115876



Change-Id: I04e762f2587d3207e1a363e128d57d0803cddf66
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>