Bug 946678 - [Messaging] Creating a new message from contacts does not open the messaging composer when Messaging app is in background r=borja

Adds a hash for the "new" activity. This will have the side-effect of not
registering the notification and sms-received system message handlers which is a
good thing.
Bug 938219 - [Contacts] Unable to select a contact via the contact update activity
Bug 949552 - Fix test_gallery_delete_image
Merge pull request #14581 from gtorodelvalle/contacts-bug-938261-contact-update-activity

Bug 938219 - [Contacts] Unable to select a contact via the contact update activity (r=jmcanterafonseca)
Bug 949422 - If a Facebook Friend is removed (from the import list), then it cannot be imported anymore
Merge pull request #14645 from jmcanterafonseca/fix_flush_final2

Bug 949422 - If a Facebook Friend is removed (from the import list), the...
Merge pull request #14463 from julienw/946678-use-href-for-activity

Bug 946678 - [Messaging] Creating a new message from contacts does not o...
Merge pull request #14627 from askeing/949552

Bug 949552 - Fix test_gallery_delete_image
Bug 928294 - [DSDS][Gaia] Settings app should support call settings of multiple sim cards