Update SVN to 21 for O6R4 Feb MPR 2022 am: 0d19675985 am: 4386aff0a1 am: b5b84ac9c0

Original change: https://googleplex-android-review.googlesource.com/c/device/google/raviole/+/16474561

Change-Id: I5b7571127c5e77cfb2e341df682d94121c94d5e3