WifiServiceImpl: add objects to track LOHSrequests

This CL only adds the objects and lock that will be used to track
LocalOnlyHotspot requestors.  CLs will follow to use these objects.

A comment was also added to a private helper method.

Bug: 31466854
Test: frameworks/opt/net/wifi/tests/wifitests/runtests.sh
Change-Id: I84554c20adb1668d8ba321f82d7ec86b56fc1eda
1 file changed
tree: f97df79579492b1219fe115a5dd8100dec63b393
  1. service/
  2. PREUPLOAD.cfg