chore: add deprecation warnings to overrides in MockUser

Signed-off-by: Josh <josh.t.richards@gmail.com>

Author: joshtrichards

app/src/main/java/com/nextcloud/client/account/MockUser.kt

@@ -44,8 +44,10 @@ data class MockUser(override val accountName: String, val accountType: String) :
     override val server = Server(URI.create(""), MainApp.MINIMUM_SUPPORTED_SERVER_VERSION)
     override val isAnonymous = false
 
+    @Deprecated("Temporary workaround: Legacy Android Account access. Refactor code to use User object directly instead of platform Account.")
     override fun toPlatformAccount(): Account = Account(accountName, accountType)
 
+    @Deprecated("Temporary workaround: Legacy OwnCloudAccount access. Refactor code to use User object directly instead of OwnCloudAccount.")
     override fun toOwnCloudAccount(): OwnCloudAccount = OwnCloudAccount(Uri.EMPTY, OwnCloudBasicCredentials("", ""))
 
     override fun nameEquals(user: User?): Boolean = user?.accountName.equals(accountName, true)