Handoff: Implement handoff in Telecomm

See the following CLs for more info on how handoff is enabled and
triggered: changeid - I94c28b10c0e0a253450f14d31ecdc416d5b44ca4

Once a Call is handoff enabled it will have a non-null mHandoffHandle.

When handoff is triggered we create a new Call object and set
mOriginalCall.

At this point we have two call objects.
  1st call: Call1
        - mHandoffHandle: non-null
        - mOriginalCall: null
  2nd (invisible) call: Call2
        - mHandoffHandle: null
        - mOriginalCall: non-null

Once the new call's state changes to active we do the following:
      call1.disconnect() // hangup on the old call
      removeCall(call2) // stop tracking the new call
      // merge into call1
      call1.setCallService(call2.getCallService());
      call1.setState(call2.State());

At this point call2 is deleted and call1 has been fully handed off.

Bug: 13643568
Change-Id: I94c28b10c0e0a253450f14d31ecdc416d5b44ca4
9 files changed
tree: f645a7d2359ec74330264629cd4ab4905421959b
  1. libs/
  2. res/
  3. src/
  4. tests/
  5. .classpath
  6. .project
  7. Android.mk
  8. AndroidManifest.xml