[automerger skipped] Merge "Add test apex for sdkextensions" am: e1f2ed5995 am: 956402942c am: 51d1abf86e -s ours
am skip reason: Change-Id I88a75b4f438004ed9425e6629666cbbae1ab0882 with SHA-1 1b7f568bd6 is in history

Change-Id: I2c39664c30f748fda460bf59f6c42048b9e0d8be