Treat Telephony as legacy app for now.

Telephony stack is relying on non-existant ContentProviders for
sending Uri change notifications; it'll eventually need to move over
to using real ContentProviders, but apply this band-aid for now.

Test: builds, boots, SMS send/receive works
Bug: 35792675
Change-Id: Ice66278f876f1c754852300da7eb045a7c778d14