Integrate call composer into the call flow

* Link uploadCallComposerPicture with the actual http upload code
* Perform download of an incoming picture once call filtering completes
* Store uploaded image into the call log once a call has been made
* Add shell commands for CTS testing of the above

Bug: 177613111
Test: atest CallComposerTest

Merged-In: I403e0b4b004b3a22ec0b1dae40f1cc88fee494fc
Change-Id: If20fd2c535b1fc0c79ded7e91bfa10e262e4630e
9 files changed