Merge "[Android T][MEP]: HAL changes for MEP feature" am: d45fd704fe am: 7ab5066b55 am: 8dd67c7184

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1839796

Change-Id: Id2466cfa4b9a5a76b79e9f1812f5a0a80abbe4b9