Cleanup Obsolete LOCAL_PRELINK_MODULE.

Bug: 18675947
Change-Id: Id1c06defba46188952779aaf16b0cf6bfac982e2
Remove unneeded PRODUCT_RUNTIMES.

Bug: 18465297
Change-Id: I60c2c812863b19a53e4e8e6448869e033073c707
label zram as a swap device.

Cherry-picked from internal commit: ee16b167cca22a6c78260d8c4831e0a80169b764

Addresses the following denials:

  avc:  denied  { write } for  pid=172 comm="mkswap" name="zram0" dev="tmpfs" ino=10221 scontext=u:r:toolbox:s0 tcontext=u:object_r:block_device:s0 tclass=blk_file permissive=1
  avc:  denied  { open } for  pid=172 comm="mkswap" path="/dev/block/zram0" dev="tmpfs" ino=10221 scontext=u:r:toolbox:s0 tcontext=u:object_r:block_device:s0 tclass=blk_file permissive=1

Change-Id: I89bec36bc726a0bad971a827f20fd2ed7c5062c5
label block devices

Cherry-picked from internal commit: aa17018423ce7443c133a01a5f6c2b92b3f808dc

Need to provide labels for the userdata, cache, and encryption
metadata partitions. Addresses multiple auditallow warnings.

Change-Id: I64ab347e4c97b827a083878d3c20498fef258c78
Assign specific types to block devices.

Change-Id: Ibcf2d9dc35fd1492afde4e9617c4f3e2f825788d
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>