Merge "Update API docs for InCallService." am: 733dd0f1e9 am: 550f4dd9a0 am: 79508c34ea am: cfc47f0ac9 am: 9cbab374c7

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1818366

Change-Id: I7c36fa7b013b8c8b91d5b542d06147418b04f3c2