Fix fd leak in KeepaliveTracker.

The semantics of FileDescriptor in AIDL are that the callee must close
the file descriptor it receives manually.

Bug: http://b/157789860
Test: treehugger
Change-Id: Ice9fc9abe2959a84ad138a95c900dff676653665
1 file changed
tree: c9b29fd8bd2021faf3b1791454c53923db8aa7e4
  1. core/
  2. services/
  3. tests/