[automerger skipped] Use system/audio to/from string converters in...

[automerger skipped] Use system/audio to/from string converters in TypeConverter am: dc6be0d5 am: a69f0713 am: 9abebbae -s ours

am skip reason: Change-Id Ia0e725026be80621bdc797299e63e134419b2b3d with SHA-1 f33115dd is in history

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/1515658

Change-Id: I179977a59c059f67d01cfb6e4bc3f309368e6472