getRadioProxy and getOemHookProxy modification

- Remove hacky getRadioProxy() and getOemHookProxy()
in EVENT_RADIO_PROXY_DEAD due to sending message delay

- Add getOemHookProxy(null) in resetProxyAndRequestList

Since P and later devices does not support Oem Hook Service in hal,
log this information for the deprecated Oem Hook Apis when it is called
in P and its later devices (it already returns useless information when
service is null).

(verified with "Disable OEM Hook" in cuttlefish ag/3879465;
 verified with "remove oem hook" in P device ag/3958422/)

Bug: 34344851
Bug: 78570593
Bug: 77496810
Test: TH tests; cuttlefish tests;
Change-Id: If1c22cd3d5ae7a8b4d081fc1a56292f9ddfb1a32