Initial intent spec for proto buffer

Change-Id: I3cc637ec3e62989c8cc9dc2af0299193f5b469f9
Added some fields to the enum for intent actions

Change-Id: I81cbb9075ee3483f2707e368f27c22300614deb3
Per Android developer guidelines, changed some optional fields to required for Notifications.

Change-Id: I2b6c67127c2e36bb96b9957a46d916a5e55aa636
Updated definition to support Location requests and responses

Change-Id: Id943880fbcc224fb081b37886d178fe4dd9e82e7
Add video control placeholders, cleanup unused stuff

Change-Id: I9b5dff69604f5259cd211c00a223608ded4be5e5