[Test Coverage] Add Unit Test for CaptureLocationTaskViewModel

Add Unit Test for CaptureLocationTaskViewModel

Few Observations:
1. Currently, In the constructor of CaptureLocationTaskViewModel we are passing `Resources`, which is an android component.
2. The idea of ViewModel is to keep it independent from the Android-specific items, like `Resources`.

What is the Current Issue?
The reason the resources is there in the `CaptureLocationTaskViewModel` is because it needs to pass to `AbstractTaskViewModel`.
In `AbstractTaskViewModel` it is only used to access the string from the resources.

How we can fix this?
The `validate` function currently passes the String (resources), rather we can pass a boolean, saying isValid or notValid. The calling site will be responsible for accessing the Android resources.
This way we can make our ViewModel, Android independent

@shobhitagarwal1612 WDYT?