Merge "r_submix: Implement get_capture_position" am: 6ca3fb08ca am: 38e37ba4c6 am: ffabaf42ef am: 41628fee87

Original change: https://android-review.googlesource.com/c/platform/hardware/libhardware/+/1642345

Change-Id: Ic5d0f696df4e0ae0afd78f4c0fda57043993687e