Fix implicit declaration of function 'GAP_BleReadPeerPrefConnParams' warning.

Change-Id: Ib7413ba8627e193e9b43f8a906d24d4a0856d173
Include <cutils/properties.h> to define property_get

Change-Id: I7476f2707b770d1112feebf8ab3ca37089d815fb
Android.mk: fix typo

Change-Id: I2972fa6f4d913ff5d370bfdce6d6bd55c5b6da0a