Merge "Expose service changed event to application (2/3)" am: 199d2c73 am:...

Merge "Expose service changed event to application (2/3)" am: 199d2c73 am: 90fd6a30 am: b9fadf69 am: 0e73bae3 am: b784e06b

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1433925

Change-Id: I803a9b4ef0dcc5ce05b3803e01b558571de16cd8