1Sources for building a prebuilts/sdk tree for metalava use in unit tests. 2 3The directory tree and generated jar files will be build as part of the metalava 4unit tests, and placed in $(gettop)/out/metalava/prebuilts/sdk. 5 6The project emulates the following history, in order of earliest to latest event: 7 8- finalized Android API 30 "Android R" (android-30) 9- finalized SDK extensions "R-ext" version 1 (android-30-ext1) 10- finalized Android API 31 "Android S" and SDK extensions "S-ext", version 2, at the same time (android-31-ext2) 11- finalized SDK extensions "S-ext", version 3 (android-31-ext3) 12