Merge "HintManagerService: allow application to create session for non-calling-processes." into sc-dev am: c5532b03 am: 1dc966c5

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

Change-Id: Ifaa2fb847422361429a5bfb29ba404eb801e1d21