Merge "camera2: Add system api to specify oom score offset while opening a camera." into sc-dev am: 441d5e9e am: f232de7b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14625167

Change-Id: Ie6f4dd01ccb6d6977d438afebd21bcf5a953ed4c