Bug fix: Move the implementation out from View.onTranslationResponse.

Keep onTranslationResponse() only to save TranslationResponse. We can
move set TransformationMethod logic to TextViewTranslationCallback.
With the current implementation, if the developers overrides
onTranslationResponse(), they don't have a chance to use the TextView
default ViewTranslationCallback implementation because they don't set
the TranslationTransformation, they must implement their solution. If
we move logic to TextViewViewTranslationCallback and the developers
only overrides onTranslationResponse(), they still have a chance to
use the default TextViewViewTranslationCallback if the developers set
the TranslationResponse for View.

Bug: 178353965
Test: manual to make sure translation still works.
Test: atest CtsTranslationTestCases

Change-Id: Iada7f3efbbc7705ecf962c78e275ed942816707f