Update text input layout style and fix focus bug.

1. Update TextInputLayout style to outline.
2. Update EditText hint to TextInputLayout.
3. Update EditText input type to word cased.
4. Update EditText to TextInputEditText.
5. Add requestFocus when create folder.

Fix: 122314827
Fix: 122083369
Fix: 118055215
Test: visual
Test: atest DocumentsUITests
Change-Id: Ic9122f74e6074761afa9e8c32c67713818b1bdce