Merge "Explicitly document overcommit and `adb shell`'s use of oom_score_adj." am: 143f3cea32 am: f29bae24dc

Original change: https://android-review.googlesource.com/c/platform/bionic/+/2638672

Change-Id: I66f0d585354552cf395a92a703af3d53cd714135
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>