Enable cfi for 32bit arch

Enabling cfi for 32-bit arch; b/35157333 seems to have been resolved in b/67507331.

Bug: 158010610

Test: manual interaction with Wimbley device: youtube video, chrome
navigations, gmail
MPTS testing on Sargo

Change-Id: I79eeb7e880ea09d857f8339901b67f77243a575c