Set default AVRCP version to 1.4

Bug: 77874113
Test: Check snoop logs to see that the broadcasted AVRCP version is 1.4
Change-Id: If36bccc58d04dffe46286ee8d18785b680b9de8a

system/bta/av/bta_av_main.cc

@@ -85,7 +85,7 @@
 #endif
 
 #ifndef AVRCP_DEFAULT_VERSION
-#define AVRCP_DEFAULT_VERSION AVRCP_1_5_STRING
+#define AVRCP_DEFAULT_VERSION AVRCP_1_4_STRING
 #endif
 
 /* state machine states */