[hardware/rockchip/libiep] IEP: initialize rga_fd when contrast mode not enable

Before this revision, when contrast mode not enable,
rga_fd will be a random value, a invalide fd will be
close when iep api destruction.

Signed-off-by: Firefly <service@t-firefly.com>

hardware/rockchip/libiep/Android.mk

@@ -48,4 +48,4 @@ LOCAL_MODULE := iep_func_test
 LOCAL_MODULE_TAGS := optional tests
 LOCAL_PRELINK_MODULE := false
 
-include $(BUILD_EXECUTABLE)
+#include $(BUILD_EXECUTABLE)

hardware/rockchip/libiep/iep_api.cpp

@@ -161,7 +161,7 @@ static void get_env_value()
         g_log_level = atoi(prop_value);
 }
 
-iep_api::iep_api()
+iep_api::iep_api() : rga_fd(-1)
 {
     //pthread_once(&g_get_env_value_once, get_env_value);
     get_env_value();