Merge "Store ETWS primary information in the database" into rvc-dev am: dc9e545b am: 28becbf0 am: 5f551b7c am: 3646a032

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11712801

Change-Id: I2c74518ac050ee00962a60280b98c7d88ac7e3a5