Add new Android camera events.

Add new Android camera events.

Add events to track when camera is requested to open,
when first camera frame is available and when camera is
closed.

BUG=b/24271359
R=perkj@webrtc.org

Committed: https://crrev.com/9781152e043e35e2f676ddcf5de079c9548f3b37
Cr-Commit-Position: refs/heads/master@{#10306}

[AlexG, 2015-10-14 23:08:30]

glaznev@webrtc.org changed reviewers:
+ perkj@webrtc.org

[AlexG, 2015-10-14 23:08:30]

PTAL

[perkj_webrtc, 2015-10-16 09:03:01]

Please add simple test for this in VideoCapturerAndrdoidTest to make sure we
don't break this if we refactor and add support for Camera2 API.

In case you want to do that in a follow up cl , lgtm

[AlexG, 2015-10-16 19:11:30]

On 2015/10/16 09:03:01, perkj1 wrote:
> Please add simple test for this in VideoCapturerAndrdoidTest to make sure we
> don't break this if we refactor and add support for Camera2 API.
> 
> In case you want to do that in a follow up cl , lgtm

Done

[AlexG, 2015-10-16 19:12:34]

The CQ bit was checked by glaznev@webrtc.org to run a CQ dry run

[commit-bot: I haz the power, 2015-10-16 19:12:46]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1398793005/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1398793005/20001

[AlexG, 2015-10-16 20:10:28]

Committed patchset #2 (id:20001) manually as
9781152e043e35e2f676ddcf5de079c9548f3b37 (presubmit successful).

[commit-bot: I haz the power, 2015-10-16 20:10:28]

Patchset 2 (id:??) landed as
https://crrev.com/9781152e043e35e2f676ddcf5de079c9548f3b37
Cr-Commit-Position: refs/heads/master@{#10306}