Revert "Mark libexif as double_loadable"

This reverts commit eb143e8347fbdd0e5d233ecfc50fc7e8ee875161.

Reason for revert: libexif is no longer used by libmediandk(aosp/915075)
Exempt-From-Owner-Approval: revert
Change-Id: Ief83294c41a63846e3e5a7860743e51b100f8570
1 file changed