Extend Battery Defender strings chars limit am: 43f10543e6 am: bd02779d93

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/13168690

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I3b91f1243bf262cf2f873f01578590f4144ad5f8