Pixel perfect phone landscape contact card

- Make contact photo larger

- Detect the difference between stream item updates with text only versus
with text + photos --> In order to add padding between images + text without
affecting the other cases

- Make tabs in tab carousel have the right initial alpha value

- Add some constants for the maxLine values in ContactDetailFragment

- Make HtmlUtils not crash with NPE if the streamItem.getText() is null.

Bug: 5254628
Change-Id: I858b4cbfac13fe2105159cf13a4bc6b64442745e