Add support for Multi-Resource Refresh Token (MRRT)

[pmathew92]

Changes

This PR moves the Credentials Manager from a single credentials model to a multiple credentials one, supporting:

1 set of app credentials (the existing functionality)
N sets of API-specific credentials
To this end, two new public methods were added to the Credentials Manager:

// And its coroutine counter part
public fun getApiCredentials(
        audience: String,
        scope: String? = null,
        minTtl: Int = 0,
        parameters: Map<String, String> = emptyMap(),
        headers: Map<String, String> = emptyMap(),
        callback: Callback<APICredentials, CredentialsManagerException>
    )

public fun clearApiCredentials(audience: String)

Testing

Please describe how this can be tested by reviewers. Be specific about anything not tested and reasons why. Since this library has unit testing, tests should be added for new functionality and existing tests should complete without errors.

• This change adds unit test coverage

• This change adds integration test coverage

• This change has been tested on the latest version of the platform/language or why not

Checklist

• I have read the Auth0 general contribution guidelines

• I have read the Auth0 Code of Conduct

• All existing and new tests complete without errors

To fix the problem, we need to ensure that the multiplication is performed using long arithmetic to prevent overflow. This can be achieved by casting one of the operands to long before performing the multiplication. Specifically, we should cast minTtl to long before multiplying it by 1000.

• Change the multiplication minTtl * 1000 to minTtl.toLong() * 1000.
• This change should be made on line 532 of the file auth0/src/main/java/com/auth0/android/authentication/storage/CredentialsManager.kt.

To fix the problem, we need to cast one of the operands to long before performing the multiplication. This ensures that the multiplication is done using long arithmetic, which prevents overflow.

• In general terms, the problem can be fixed by casting one of the operands to long before the multiplication.
• Specifically, we will cast minTtl to long before multiplying it by 1000.
• The change will be made on line 891 of the file auth0/src/main/java/com/auth0/android/authentication/storage/SecureCredentialsManager.kt.
• No additional methods, imports, or definitions are needed to implement this change.