Merge "Make sendMessage ListenableFuture" am: 2fe5ea0499 am: f3746d26b0 am: d9bbc377df

Original change: https://android-review.googlesource.com/c/platform/packages/services/Telephony/+/1640203

Change-Id: Ib3cc32302c6ab5c4daaf415e3c05e9f7d18d5ad9