Merge "Always run ensureInAppMountNamespace() to make sure app process runs in its mount namespace" am: 52c968759a am: 0aa41b3b5e am: 9983f044ff

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1554432

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Id8d9c08b8a3ca321cf5e82b66ead32958a03f58b