Merge "Update text string for performance boost notification" into udc-dev am: 6cab17b4

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21662038



Change-Id: Ie720d735183946a8db7e0a4c3b50a3016f68ab98
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>