Define new shell commands to get and modify UCE PUBLISH

1) Define "override-published-caps", which allows a user to add
and remove capabilities from the UCE PUBLISH.
2) Define "get-last-publish-pidf", which allows a user to get
the last successful PIDF XML or "none" if we are not published.

Bug: 180033898
Test: test commands with "adb shell cmd phone uce ..."
Merged-In: I53634773b21c7cc4dfb560c18a21000d8179e122
Change-Id: I53634773b21c7cc4dfb560c18a21000d8179e122
4 files changed