Impl highlight effect on BatteryChartView slots. am: 6750634259

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/24498956

Change-Id: Iff96ebb33e50b2c2bddbe44eada5bf35f7118531
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>