Merge "BatteryService: expose capacity level API" into main am: 88184c4724

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3164137

Change-Id: I2f01a080bccb6a400c17459d92d553454a04bce4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>