Add @UnsupportedAppUsage annotations to telephony-common.

See go/UnsupportedAppUsage for more details.

This is needed to not lose greylist information, by moving telephony-common from bootclasspath in ag/9025572.

Bug: 137350495
Bug: 139336111
Test: m

Change-Id: Id6c1f5e403a0e66edb1102ee45f3bf19f244fb09