Add OWNERS in hardware/ril

* Owners are selected from top CL approvals or owners.
  They will be suggested to review/approve future CLs.
* OWNERS files are recognized by the new find-owners plugin, see .md files in
  https://gerrit.googlesource.com/plugins/find-owners/+/master/src/main/resources/Documentation/

Test: build/make/tools/checkowners.py -c -v OWNERS
Change-Id: I2913a58e488d305a793e0883e011aacf372c9d3f
1 file changed
tree: 46b1e6cbcbad924adaf4dda9ca7be552c61468d1
  1. include/
  2. libril/
  3. librilutils/
  4. reference-ril/
  5. rild/
  6. CleanSpec.mk
  7. OWNERS