Implement FORCE_SYNC intent

See merge request e/apps/eDrive!69

To force a sync, you can now:

adb shell am broadcast -a foundation.e.drive.action.FORCE_SYNC

Update nextcloud-android-lib submodule

See merge request e/apps/eDrive!68

Reset OperationManagerService setting

See merge request e/apps/eDrive!64

Introduce EdriveApplication class

See merge request e/apps/eDrive!61

Reset OperationManagerService setting if service gets killed
and also at boot so that OperationManagerService always run
again if something bad happens.

EdriveApplication is the class instantiated before any other class
in the projet.

The application is set as persitent, meaning if it gets killed,
it will be respawned by the system. The application will also
start automatically at boot so BootCompleteReceiver becomes
useless.

Remove ide files from source control

See merge request e/apps/eDrive!63

.gitignore is now updated.

Update Gradle version to fix build

See merge request e/apps/eDrive!62

Fix bug when eDrive doesn't detect user account on os update in Nougat

See merge request e/apps/eDrive!41

Resolve "add /e/ userAgent in request"

Closes #113

See merge request e/apps/eDrive!34

Resolve "reduce eDrive polling"

Closes #114

See merge request e/apps/eDrive!36

Fix issue when eDrive doesn't detect user account after update

See merge request e/apps/eDrive!33

- Fix issue when eDrive doesn't recognise User account after update