[automerger skipped] Merge "Frameworks: convert platformprotos to soong" into stage-aosp-master am: 6928e50c26  -s ours am: 3b71cfc0df  -s ours
am: fe75de61c9  -s ours

Change-Id: I9f2ea4c2dbcd94d02c82086f259f159d76f0e9f3