Make Translation APIs coverred.

We use a custom TranslationService in the cts test, we override
onConnected() and onDisconnected() but we don't call super that
makes TranslationService methods are not being called.

Call super in onConnected() and onDisconnected() to fix the issue.

Bug: 183239233
Test: atest CtsTranslationTestCases
Change-Id: I01efe009863c9622608898cf76f4726c4b5161da
1 file changed