Merge "Update battery saver footer strings" into sc-dev am: 208f294d am:...

Merge "Update battery saver footer strings" into sc-dev am: 208f294d am: 0821f7f2 am: 7fb2d7de

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14440876

Change-Id: I4453625c1766504b11eec062fd3f80734b1280b4