[Change]

开始USB摄像头的功能集成，还无法获取usb连接广播需要调试

Signed-off-by: donghongyu <donghongyu@zhidaoauto.com>
(cherry picked from commit b10306fc45)

libraries/map-usbcamera/src/main/java/com/serenegiant/utils/Time.java

@@ -0,0 +1,40 @@
+package com.serenegiant.utils;
+
+import android.annotation.SuppressLint;
+import android.os.SystemClock;
+
+public class Time {
+
+	public static boolean prohibitElapsedRealtimeNanos = true;
+
+	private static Time sTime;
+	static {
+		reset();
+	}
+
+	public static long nanoTime() {
+		return sTime.timeNs();
+	}
+	
+	public static void reset() {
+		if (!prohibitElapsedRealtimeNanos && BuildCheck.isJellyBeanMr1()) {
+			sTime = new TimeJellyBeanMr1();
+		} else {
+			sTime = new Time();
+		}
+	}
+	
+	private Time() {
+	}
+	
+	@SuppressLint("NewApi")
+	private static class TimeJellyBeanMr1 extends Time {
+		public long timeNs() {
+			return SystemClock.elapsedRealtimeNanos();
+		}
+	}
+	
+	protected long timeNs() {
+		return System.nanoTime();
+	}
+}