Replace the current exposure status with a positive result card when test result is positive (#79)

* Made submission status card style more cross device friendly

Signed-off-by: Kolya Opahle <k.opahle@sap.com>

* Added the positive result submission status card

Signed-off-by: Kolya Opahle <k.opahle@sap.com>

* lint fix

* Updated main fragment documentation

* Added icon for sharing risk status

Signed-off-by: Kolya Opahle <k.opahle@sap.com>

* Updated positive result home screen card text and icons

Signed-off-by: Kolya Opahle <k.opahle@sap.com>