Merge "Add parameter for exposing a dummy seekmap." into rvc-dev am: db853ad3 am: ac2660f3 am: 969061d1 am: 37cdfcf2

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11712603

Change-Id: I6b5a92e6c1d9e3107bbb55cb5752073ab0989a71