Merge "Persistent process is ProcessRecord.isPersistent()." into tm-dev am: 4a1fc38e am: e2621d0c am: f8fdadaa

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17993187



Change-Id: Icc964d36d37a0d0b786ddae87699c2c03be96b60
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>