Some refactorization for the login logic

Description

1. I made some renamings towards names that make more sense:

• Rename LoginSourceInterface to StoreAuthenticator
• Rename LoginSourceRepository to AuthenticatorRepository
• Rename LoginDataStore to LoginData
• Rename GPlayLoginInterface to PlayStoreLoginManager
• Rename GPlayFactory to PlayStoreLoginManagerFactory
• Rename BaseStoreRepository to StoreRepository

2. I sanitized the PlayStoreLoginManager interface:

It is now:

interface PlayStoreLoginManager {
    suspend fun login(): AuthData?
    suspend fun validate(authData: AuthData): PlayResponse
}

Parameters of login are now taken from the data store.

3. I also sanitized the StoreAuthenticator interface:

interface StoreAuthenticator {
    suspend fun login(): AuthObject
    suspend fun logout()
    fun isStoreActive(): Boolean
}

Screenshots

Technical details

Tests

Issues

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