healthd: charger: Run animation even if capacity is 0

If charger is connected and battery capacity is 0, charging animation should
run. The device would be booted up even if capacity is 0 in off-mode charging.
At that time, it would take some time to be 1 from 0 for capacity if you
use USB charger.

Bug: 17606689
Change-Id: I37e0f1b6ab0ee1f6d833882e169bf3ea06cf2399
diff --git a/healthd/healthd_mode_charger.cpp b/healthd/healthd_mode_charger.cpp
index 345f354..394feb8 100644
--- a/healthd/healthd_mode_charger.cpp
+++ b/healthd/healthd_mode_charger.cpp
@@ -68,7 +68,7 @@
 #define UNPLUGGED_SHUTDOWN_TIME (10 * MSEC_PER_SEC)
 
 #define BATTERY_FULL_THRESH     95
-#define SCREEN_ON_BATTERY_THRESH 1
+#define SCREEN_ON_BATTERY_THRESH 0
 
 #define LAST_KMSG_PATH          "/proc/last_kmsg"
 #define LAST_KMSG_PSTORE_PATH   "/sys/fs/pstore/console-ramoops"