Merge "limit TelecomManager#registerPhoneAccount to 10; api doc update" into qt-dev am: 08f8988bc3 am: 8193edd104 am: 74f9b7f432 am: 6b36ce6895 am: e518ef6409 am: 4636aea564 am: d4e7e2336a

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16908080

Change-Id: Ibf4807763da204c162015da29468328bb1a7e5a9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>