[PM] Update the layout of PIA V1

If the layout_width of the TextView is wrap_content, it causes some
UI issues with the scollbar. Change it to match_parent to make it
bigger to reduce the strange UI issue.

Flag: EXEMPT UI ONLY
Bug: 428632899
Test: manual
Change-Id: I8a101cf1ae9fbfe8cd13d55c732ff6e0f665e503