minadbd: Remove two warning options.

'-Wimplicit-function-declaration' is not needed (it's for C89) and
already enabled by -Wall.

For '-Wno-missing-field-initializers', don't see any existing case that
requires the flag.

Test: `mmma -j bootable/recovery` on aosp_{bullhead,marlin}-userdebug.
Change-Id: I46604723087ed9a7747f6cae31a95fc0074c6758
diff --git a/minadbd/Android.mk b/minadbd/Android.mk
index 3c9ab3a..50e3b34 100644
--- a/minadbd/Android.mk
+++ b/minadbd/Android.mk
@@ -16,10 +16,9 @@
 
 minadbd_cflags := \
     -Wall -Werror \
-    -Wno-missing-field-initializers \
     -DADB_HOST=0 \
 
-# libadbd (static library)
+# libminadbd (static library)
 # ===============================
 include $(CLEAR_VARS)
 
@@ -30,7 +29,6 @@
 
 LOCAL_MODULE := libminadbd
 LOCAL_CFLAGS := $(minadbd_cflags)
-LOCAL_CONLY_FLAGS := -Wimplicit-function-declaration
 LOCAL_C_INCLUDES := bootable/recovery system/core/adb
 LOCAL_WHOLE_STATIC_LIBRARIES := libadbd
 LOCAL_STATIC_LIBRARIES := libcrypto libbase