Merge "HintManagerService: allow application to create session for non-calling-processes." into sc-dev am: c5532b03 am: 2b28e171 am: 28fe53e9

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15162886

Change-Id: I8b0663e353d5c90317b02086ea1c9c23d7483558