Implemented context menu actions.

Actions implemented in this CL:
 - placing a voice call
 - placing a video call
 - opening an sms conversation
 - opening a contact card

Remove action will be implemented in a follow up CL.
Made a few adjustments to the context menu UI.

Bug: 77761023
Test: ContextMenuTest
PiperOrigin-RevId: 193994428
Change-Id: I85b328f5820175ff91514c0057267b85649b0755