Revert^4 "CalendarTests minsdk  bump from 19 to 21"

222073fa50e293f3fdde3a5d3527e0a4c2a1d762

Change-Id: Ie3129c6b2209011672727e792cb45b1be94b481e
Merged-In: Ia2f80a011daaf4921032538dea98627c83d30843
1 file changed