setTransformationMethod should reset mTextDir

When transformation method is set via API, text direction heuristics has
to be reset since for PasswordTransformationMethod it is set to LTR. Not
resetting it causes inconsistencies with the remaining of the TextView.

Bug: 28562779
Change-Id: I225e35e39bde60d4296852ff17b107d5b7b99f8a
1 file changed