Fix media side clipping on large screen portrait

In large screen, the left bound is not 0. Instead, use the proper left
bound so the media player will not be clipped on the right.

This doesn't fix the bottom clipping as that's tied to the translation
animation.

Test: manual
Bug: 220869154
Change-Id: I4b58853b6e9e4102fe6d2e5ff58b1551d8cf0bea