Tyler Gunn 8bf7657357 Add connection handover APIs.
Add new call/connection event keys for handover.
Add TelecomManager extra keys used for handover.
Add PhoneAccount extra keys used to control availability of handover.

Test: Test app/harness.
Bug: 37102939
Change-Id: Icc5db7209362f04c4e3be397fee692bbf4a6a473
2017-04-10 22:12:45 +00:00
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