domain.te: remove /proc/sys/vm/overcommit_memory read access

Remove everyone's ability to read /proc/sys/vm/overcommit_memory.
Android's jemalloc implementation no longer uses this file.

init.te had multiple rules which allowed writing to this file. Get rid of
the duplicate rule.

Bug: 140736217
Test: compiles and boots
Test: bypass setup wizard and start the browser, browse the web
Change-Id: I5a2d5f450f5dde5dd55a0cedd7fbd55a6ac0beed
2 files changed