Declare READ_EXTERNAL_STORAGE permission for Telecom.

We have seen some bugs where playing a ringtone installed by a third party
app results in a failure to play the ringtone.

Test: Compile
Bug: 74051324
Merged-In: I08d548b615a16e190cb7c03ffa6f731fe7ac9a3f
Change-Id: I08d548b615a16e190cb7c03ffa6f731fe7ac9a3f
(cherry picked from commit 9ca0f2cb)