LE batch scan feature

BTIF and stack changes for batch scan feature

Change-Id: I4dd2d551435e9f1f0e43906bd695294e97ed4bba
diff --git a/stack/Android.mk b/stack/Android.mk
index fd76ed8..404d3d8 100644
--- a/stack/Android.mk
+++ b/stack/Android.mk
@@ -66,6 +66,7 @@
     ./btm/btm_dev.c \
     ./btm/btm_ble_gap.c \
     ./btm/btm_ble_multi_adv.c \
+    ./btm/btm_ble_batchscan.c \
     ./btm/btm_acl.c \
     ./btm/btm_sco.c \
     ./btm/btm_pm.c \