Fix close button in workEDU card not 48dp.

Can use insets to make it appear the same small visual but have a 48dp tap target. Since delegating the touch to the 48dp,
we can make the imageButton clickable to false as it's instead being used by the 48dp frame.

- since there's no rtl catering for insets insets must have equal left and right values.
   * this means to reduce the end margin of the text to be given to the LEFT inset of the inset_rounded_action_button
   * reduce end margin of the linearlayout to be given to the right inset of the drawable.

bug:379794419
Test manually photos:
beforeRTL:https://drive.google.com/file/d/1-DzcjOTywgk6SFjfCX7AVnmfqsIfa1lh/view?usp=sharing
afterRTL:https://drive.google.com/file/d/1UERlZ7XdoF0NhFuQE-oMulqgW9sDq9cy/view?usp=sharing
before:https://drive.google.com/file/d/1h5_Ljsx1rLyKum1PK7IRwD14ps2SPKC3/view?usp=sharing
after:https://drive.google.com/file/d/1b_8rgrC8WlDIdQuO7gOXS0MDNCISfxWr/view?usp=sharing
Flag: EXEMPT bug fix

Change-Id: I017d4d34ef6e42fa49543c5f787063b061c382dc