xd: Initial xdsp manifest bringup.
xd: xdsp: Track `system/update-engine` from xdsp
xd: xdsp: track `prebuilts/tools-xdroid` from lineage
xd: [DONT_MERGE_ME] Merge `README.md` of https://github.com/xdsp-prjkt/xd_manifest
xd: xdsp: Track `vendor/google` from our org
xd: xdsp: Track many repos from our org.
xd: Rebranding our org to xdOSS
xd: AOSP: Merge tag `android-12.0.0_r29` of https://android.googlesource.com/platform/manifest into twelve