Revert "[SettingsProvider] @Readable annotation to restrict acce..."

Revert "[cts] tests for settings readable fields"

Revert submission 13355582-settings_readable

Reason for revert: b/178340718 b/178329499 b/178234427
Reverted Changes:
Id1f133d52:[cts] tests for settings readable fields
I8a2733580:[SettingsProvider] @Readable annotation to restric...

Change-Id: Ia55e58106e49ba411603bbadd8d909e22516293e