Finish AppTasks on UI thread during test tear down

Finish AppTasks on UI thread during test tear down

Finish AppTasks on the UI thread rather than the insturmentation
thread during test setup and tear down. Also eclose the finishAndRemoveTask()
calls in a try-catch block so that otherwise passing tests don't fail
on Android framework exceptions.

BUG=653731
Committed: https://crrev.com/3a6e675bcca631ad83cd0dd7412c87297467bcda
Cr-Commit-Position: refs/heads/master@{#423759}

[Theresa, 2016-10-06 23:57:15]

The CQ bit was checked by twellington@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-10-06 23:57:33]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Theresa, 2016-10-07 00:00:10]

The CQ bit was checked by twellington@chromium.org to run a CQ dry run

[Theresa, 2016-10-07 00:00:16]

twellington@chromium.org changed reviewers:
+ tedchoc@chromium.org

[Theresa, 2016-10-07 00:00:16]

ptal

[commit-bot: I haz the power, 2016-10-07 00:00:40]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Ted C, 2016-10-07 00:08:25]

lgtm

[Theresa, 2016-10-07 00:09:32]

The CQ bit was unchecked by twellington@chromium.org

[Theresa, 2016-10-07 00:09:32]

The CQ bit was checked by twellington@chromium.org

[commit-bot: I haz the power, 2016-10-07 00:09:45]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-10-07 00:28:10]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-10-07 00:32:22]

Description was changed from

==========
Finish AppTasks on UI thread during test tear down

Finish AppTasks on the UI thread rather than the insturmentation
thread during test setup and tear down. Also eclose the finishAndRemoveTask()
calls in a try-catch block so that otherwise passing tests don't fail
on Android framework exceptions.

BUG=653731
==========

to

==========
Finish AppTasks on UI thread during test tear down

Finish AppTasks on the UI thread rather than the insturmentation
thread during test setup and tear down. Also eclose the finishAndRemoveTask()
calls in a try-catch block so that otherwise passing tests don't fail
on Android framework exceptions.

BUG=653731

Committed: https://crrev.com/3a6e675bcca631ad83cd0dd7412c87297467bcda
Cr-Commit-Position: refs/heads/master@{#423759}
==========

[commit-bot: I haz the power, 2016-10-07 00:32:23]

Patchset 2 (id:??) landed as
https://crrev.com/3a6e675bcca631ad83cd0dd7412c87297467bcda
Cr-Commit-Position: refs/heads/master@{#423759}