Revert "Bug 986329 - Fix test_settings_XXX.py with JavascriptException: TypeError: window.wrappedJSObject.Settings is undefined"

This reverts commit fab38c4384733c3eed51ceaec2787c7d5962dcd3.
Bug 986329 - Fix test_settings_XXX.py with JavascriptException: TypeError: window.wrappedJSObject.Settings is undefined
Bug 975535 - [VsD Refresh] Update App Icons in Homescreen & Settings/App Permissions
Bug 971554 - [System2] Instantiable SoundManager
Bug 988261 - Hide utility tray on launchapp event
Bug 963003 - Fix attention screen height on software home button shown
Bug 988399 - [B2G][Contacts] Contacts birthday set to January first incorrectly shows previous year
Bug 987283 -usage app cold_load_launch regressed 300ms Mar 22
Bug 975535 - E.me followups [r=ranbena]
Revert "Merge pull request #17673 from marshall/ftuPing"

This reverts commit c3c12544f7acbf0e66d7d481c0718634e068d3ce, reversing
changes made to d84935863b56ea76d7d33486f44a64467a70885f.
Bug 979750 - [System2] "attention_screen" and "media_recording" missing "Applications"
Merge branch 'master' of https://github.com/mozilla-b2g/gaia
Bug 969525 - Wrong message exporting contacts with USBStorage enabled

Fixed:
- Rewrite updateStorageOptions function for better readability
- Got rid of Settings dependency
- Tests added for export, fixed for import
Bug 971556 - [System2] Instantiable SourceView.
Bug 988484 - [Camera] HUD blinks on startup
Merge branch 'master' of https://github.com/mozilla-b2g/gaia
Bug 988441 - [Camera][Madai][Mozilla][UX] 1.4 Image Preview text should match confirmation text
Bug 971553 - [System2] Instantiable SoftwareButtonManager r=alive
Bug 983171 - Disable intermittent failing test in screen_lock_settings_test.js
Merge pull request #17710 from mpizza/Bug_979750_landed_in_master

Bug 979750 - [System2] "attention_screen" and "media_recording" missing "Applications". r=alive