Set release flags for 36.1 finalization

Generated with:
for release in next trunk trunk_staging; do build-flag --quiet --release=$release set RELEASE_PLATFORM_SDK_VERSION_FULL 36.1; done
for release in next trunk trunk_staging; do build-flag --quiet --release=$release set RELEASE_PLATFORM_SDK_VERSION 36; done
for release in next trunk trunk_staging; do build-flag --quiet --release=$release set RELEASE_PLATFORM_SDK_EXTENSION_VERSION 20; done
for release in next trunk trunk_staging; do build-flag --quiet --release=$release set RELEASE_PLATFORM_BASE_SDK_EXTENSION_VERSION 20; done

for flag in RELEASE_PLATFORM_VERSION_ALL_CODENAMES RELEASE_PLATFORM_VERSION_CODENAME RELEASE_PLATFORM_VERSION_ALL_PREVIEW_CODENAMES; do build-flag --quiet --release=next set $flag REL; done

Test: m sdk sdk_repo dist
Bug: 429966086
Change-Id: If3b272bf53c5116431136425551fc5022459b9fa