Create exception hierarchy for RecoveryController

Sets up a sensible exception hierarchy. Consolidates two error codes
that both represented some kind of internal error into a single code.
Fixed some cases where the wrong error codes were used to signal.

Test: adb shell am instrument -w -e package
com.android.server.locksettings.recoverablekeystore
com.android.frameworks.servicestests/android.support.test.runner.AndroidJUnitRunner

Change-Id: I6b1f97715cdc28a4be79912abb6f48e6657b048b