Rename build job to iMessage - #2

Fixes signalapp#9407
Fixes signalapp#10166

The view needs to request a call to `fitsSystemWindows`; otherwise it
cannot determine where to layout itself within the parent that uses
fitsSystemWindows method to determine the boundary of it.

This fixes the issue reported in [the beta 5.3 forum](https://community.signalusers.org/t/beta-feedback-for-the-upcoming-android-5-3-release/25088/315).

Fixes signalapp#10913

There was a race condition where if you created a blob super-early in
the application lifecycle, you could create it *before* we deleted the
blobs from the previous session, leading you to lose the blob you just
created immediately.

In an effort to protect our cold start time, I just made a little
initialization flow where read/write calls to BlobProvider will block
until it's deleted blobs from the old session.

Fixes signalapp#10817

Defensive array list copies where used in builders and Intent#putParcelableArrayListExtra.

Spelling.

Co-authored-by: Alan Evans <alan@signal.org>

… for.

Instead of trying to keep track of changes as we go and hope that lines
up with reality, now we just write all of our changes and do another
diff at the end to build our insert/delete set. Nice and simple.