Merge "Remove sdkextension sdk definition" into rvc-dev am: f3b1cd617e am: 92d7c1d854 am: c571e6f670

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/SdkExtensions/+/11754284

Change-Id: I7df040fde4eb7b0f57375c975cddadbad3aa6db5