Bug 835350 - Bookmarks customization depending on MCC SIM card

reuse getICCSettings pattern from system/js/operator_variant/operator_variant.js

add zfill function to pad leading zeros for mcc/mnc, now always 6 digits

Use DEFAULT_BOOKMARK, DEFAULT_MNC instead of spread strings
Bug 832182: [Communication] Allows second phone call.
fix bug 852820
Revert "Bug 845487 - Dialer responds to cross-origin messages without verifying the source (exploitable)."

This reverts commit 7e0e1b8925214718c400dcdecbe680c8c64b68d8.
Merge pull request #8734 from KevinGrandon/fix_lint_errors

Revert "Bug 845487 - Dialer responds to cross-origin messages without verifying the source (exploitable)."
Merge pull request #8723 from weideng/master

fix bug 852820 r=djf
Merge pull request #8610 from rexboy7/fix-bug832182-2call-unit

Bug 832182: [Communication] Allow second phone call.
Merge pull request #8606 from gasolin/issue-835350

Issue 835350 Customize Browser Bookmark via iccsettings, r=bfrancis
Bug 845487 - Dialer responds to cross-origin messages without verifying the source (exploitable).
Merge pull request #8738 from gtorodelvalle/dialer-bug-845487-cross-origin-exploit-reloaded

Bug 845487 - Dialer responds to cross-origin messages without verifying the source (exploitable) (r=crdlc)
Bug 850250 - [Contacts] Gmail connector should import the contacts just from 'My Contacts' section
Merge pull request #8680 from arcturus/bug-850250

Bug 850250 - [Contacts] Gmail connector should import the contacts just from 'My Contacts' section