Added UI/Integration tests for creating Tellers, Teller list, teller details and Teller Task mgmt. features

[varsvat]

This PR has been made on top of this PR

Please Add Screenshots If any UI changes:

1. Test teller item creation successfully

• Enter Code
• Enter password
• Enter cash withdraw limit
• Enter teller Account identifier
• Enter Teller Vault identifier
• close the soft keyboard
• check if the denomination required checkbox is check, if not then check it
• swipe up the stepper layout rv
• Enter cash over short account
• Enter assigned Employee
• Navigate to the next stepper screen
• Check if the teller was created successfully?
• delete the test entry from the database after the test is successful

VID_20210820174636.mp4

2. Test Teller List fragment and recyclerView onclick

• Launch the application
• Navigate to the teller list fragment and check if recyclerview is visible
• click on the recyclerView Item
• Assert if the item has been displayed correctly

3. Test teller state changed successfully

• launch the teller list fragment
• open the teller details fragment
• click on the tasks linear layout
• check if the state was updated successfully?

VID_20210820174433.mp4

TellerTaskTests.mp4

Please Add Summary of what changes you have made and if possible provide links.(Optional)

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[varsvat]

@jawidMuhammadi please review the changes whenever you are free :)