sepolicy: Add mmap for profman

SELinux has a separate file mmap permission in 4.14+ kernels.  Add this
to profman in cases where it could already access files.

Bug: 112990132
Test: atest com.android.cts.dexmetadata.InstallDexMetadataHostTest
Change-Id: I4f3cd55fbd4d0052500f07aac7d286c397758abc