Add a TW_NO_TIMEOUT option

Change-Id: Ifb3a5bd9f1e6c2e9810c90b0aec198e91d5956fc
diff --git a/Android.mk b/Android.mk
index a6a82ef..9ef4e67 100644
--- a/Android.mk
+++ b/Android.mk
@@ -99,6 +99,9 @@
 LOCAL_C_INCLUDES += system/extras/ext4_utils
 
 #TWRP Build Flags
+ifneq ($(TW_NO_SCREEN_TIMEOUT),)
+    LOCAL_CFLAGS += -DTW_NO_SCREEN_TIMEOUT
+endif
 ifeq ($(BOARD_HAS_NO_REAL_SDCARD), true)
     LOCAL_CFLAGS += -DBOARD_HAS_NO_REAL_SDCARD
 endif