Merge "Adding @SystemApi annotation to Bluetooth energy stats." am: a12c77ab44 am: a125c31d21 am: f91171d35e am: 6f74b5dd8b

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1854179

Change-Id: I9e271a266c640fb739a5c394d0f5d091803143f4