Add flags to <uses-permission> manifest tags.

As part of an upcoming feature, developers will need the ability to
clearly communicate that they'll never use a permission derive the
physical location of the device, regardless of ACCESS_FINE_LOCATION
and/or ACCESS_COARSE_LOCATION being granted.  The first use of this
is the BLUETOOTH permission, but developers may need to communicate
this for other permissions such as READ_PHONE_STATE, etc.

This change begins parsing this developer declaration as one of
multiple "usesPermissionFlags", which are then stored in a new
ParsedUsesPermission object.  To minimize refactoring, we continue
to offer this data through the older String-based APIs.

Bug: 181812281
Test: atest FrameworksServicesTests:PackageParserTest
Test: atest com.android.server.pm.parsing
Test: atest -p core/java/android/content/pm \
            core/java/com/android/internal/content \
            services/core/java/com/android/server/pm \
            services/tests/servicestests/src/com/android/server/pm
Change-Id: I2ccda05cf416653d311151591f91ae55a729e05b