Merge "MidiService: protect private service info" into sc-dev am: ca7c3b75 am: 14f4a269 am: 82df92fd

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14341823

Change-Id: I03af25af009c8f974c1e04971f9cf9c22af2cb4f