Uninstall engine immediately and allow reinstall in onCancel.
Set previous list with default engine in onCancel.
Keep default engine change in operation and remove now unnecessary view refresh.

* For #7219 - Use accent color for downloads dialog positive button

* For #7219 - Fixes gap beneath download notification dialog

* switch to setimageresource

* For perf-frontend-issues#16: specify device_config parameter to be 'android7' when running Nimbledroid tests. This will switch the tests from running Android5 to Android7, which is a better representation of our user's experience

* Ensure we can test with both Android5 and Android7

This call will acquire a "write" lock at the storage layer (sqlite's reserved+),
which may interfere with migrations that run during startup as well (they need to
write to storage, and so also need to acquire a lock). If these operations clash,
we get a SQLITE_BUSY crash. For now, just disable the maintenance operation.

I'm sorry, Dave, I'm afraid I can't do that.

* Fixes #7048.
Adds extension function to check if online or not based on capabilities
Modified `buildDeviceList`
Modifies tests

* Fixing lint error for max length
Fixing test in AppRequestInterceptorTest.kt

* Adds suppression for deprecation
Moving away from using anko for ConnectivityManager instance

* Creates ConnectivityManager extension component

* Fixes #7180
Refactors test cases to fix static mocks

* Fix 5366 - Use VectorDrawableCompat for all imagery

* Fix detekt lint issues

* Restore previous comment contents

This ensures that the bar is expanded when opening a link in a new tab

Add tests for verifying basic UI functionality of Enhanced Tracking Protection

Set visibility for feature flags before settings screen it's displayed.
Change string for preference to match existing header string.
Update UI Tests

If the intent that starts the HomeActivity includes an extra
boolean flag named finishonboarding and it is set to true,
Fenix will "finish onboarding".