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

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

Change-Id: Id37a9c20bb4f206f3afb2e3eed06480b8649627f