Support reading since_epoch and secondary brightness files

TWFunc::Fixup_Time_On_Boot: Will now try to read
/sys/class/rtc/rtc0/since_epoch to correct time, if that fails
it will try to use the ats files to correct time.

TWFunc::Set_Brightness: One single function to set brightness
from both the automated functions and the gui actions. It is
able to set a second brightness path if present, it will set
them both the same value. Many Sony devices have 2 brightness
files in the sysfs that must be set to properly set the
brightness.

Change-Id: I7ca582109085dfbcb46b8de73ad031e4b7903fca
diff --git a/Android.mk b/Android.mk
index 6d0b840..921a84b 100644
--- a/Android.mk
+++ b/Android.mk
@@ -261,6 +261,9 @@
 ifneq ($(TW_BRIGHTNESS_PATH),)
 	LOCAL_CFLAGS += -DTW_BRIGHTNESS_PATH=$(TW_BRIGHTNESS_PATH)
 endif
+ifneq ($(TW_SECONDARY_BRIGHTNESS_PATH),)
+	LOCAL_CFLAGS += -DTW_SECONDARY_BRIGHTNESS_PATH=$(TW_SECONDARY_BRIGHTNESS_PATH)
+endif
 ifneq ($(TW_MAX_BRIGHTNESS),)
 	LOCAL_CFLAGS += -DTW_MAX_BRIGHTNESS=$(TW_MAX_BRIGHTNESS)
 endif