ResponseCache: only hang onto a reference to the AsyncServer, not the AsyncHttpClient.

Change-Id: Ic2a2f0b50be8960f56a0d32c4d58642e3bc5afea
Merge remote-tracking branch 'koush/master' into cm-10.2
iml file

Change-Id: I0bd0cf82f1d9a99d9003eeff4829457164365230