android 11.0 控制Camera开关

11.0 通过系统属性值来控制camera开关
1.控制系统打开camera，通过CameraManager来实现控制打开camera

--- a/frameworks/base/core/java/android/hardware/camera2/CameraManager.java
+++ b/frameworks/base/core/java/android/hardware/camera2/CameraManager.java
@@ -52,7 +52,7 @@ import java.util.concurrent.Executors;
 import java.util.concurrent.RejectedExecutionException;
 import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.TimeUnit;
-
+import android.os.SystemProperties;
 //SPRD import
 import and