write the diff number into Settings and take care of read_only
This change include
1. It will write the number of the differences between new storage and
settings into the settings, so it will be easier for people to check
if there is difference for each boot.
2. Read_only flags will not be sync in the bulk sync, and their server
and local value won't be compared.
Test: atest
SettingsProviderTest:com.android.providers.settings.SettingsStateTest
Bug: 334947472
Change-Id: I5ed4cecd7488a56ad9e73d1f4c56bd76945fc871
2 files changed
