Allow implicit-fallthrough warnings locally.

It will be a global error by default.

Test: make checkbuild
Bug: 112564944
Change-Id: Iccb4189374015ceea26b0d9b3d3af2afdccbde38
Exempt-From-Owner-Approval: do not block on new warnings
diff --git a/wifi/1.3/default/Android.mk b/wifi/1.3/default/Android.mk
index 541e5f0..e05d2f0 100644
--- a/wifi/1.3/default/Android.mk
+++ b/wifi/1.3/default/Android.mk
@@ -30,6 +30,8 @@
 ifdef WIFI_HIDL_FEATURE_DISABLE_AP
 LOCAL_CPPFLAGS += -DWIFI_HIDL_FEATURE_DISABLE_AP
 endif
+# Allow implicit fallthroughs in wifi_legacy_hal.cpp until they are fixed.
+LOCAL_CFLAGS += -Wno-error=implicit-fallthrough
 LOCAL_SRC_FILES := \
     hidl_struct_util.cpp \
     hidl_sync_util.cpp \