NAVAND-552: use elapsed time to check prefetching interval

Author: dzinad

libnavigation-util/src/main/java/com/mapbox/navigation/utils/internal/Time.kt

@@ -1,17 +1,28 @@
 package com.mapbox.navigation.utils.internal
 
+import android.os.SystemClock
 import java.util.concurrent.TimeUnit
 
 interface Time {
+
     fun nanoTime(): Long
+
     fun millis(): Long
-    fun seconds(): Long
 
+    fun seconds(): Long
     object SystemImpl : Time {
         override fun nanoTime(): Long = System.nanoTime()
 
         override fun millis(): Long = System.currentTimeMillis()
 
         override fun seconds(): Long = TimeUnit.MILLISECONDS.toSeconds(millis())
     }
+
+    object SystemClockImpl : Time {
+        override fun nanoTime(): Long = SystemClock.elapsedRealtimeNanos()
+
+        override fun millis(): Long = SystemClock.elapsedRealtime()
+
+        override fun seconds(): Long = TimeUnit.MILLISECONDS.toSeconds(seconds())
+    }
 }

libnavui-voice/src/main/java/com/mapbox/navigation/ui/voice/api/VoiceInstructionsPrefetcher.kt

@@ -26,7 +26,7 @@ class VoiceInstructionsPrefetcher internal constructor(
     private val timePercentageToTriggerAfter: Double,
     private val nextVoiceInstructionsProvider: NextVoiceInstructionsProvider =
         TimeBasedNextVoiceInstructionsProvider(observableTime),
-    private val timeProvider: Time = Time.SystemImpl,
+    private val timeProvider: Time = Time.SystemClockImpl,
 ) : MapboxNavigationObserver {
 
     /**