Use low latency properties in DashMediaSource

Issue: #4904
PiperOrigin-RevId: 337046645

testdata/src/test/assets/media/mpd/sample_mpd_live_with_complete_service_description

+<?xml version="1.0" encoding="utf-8"?>
+<MPD
+		type="dynamic"
+		suggestedPresentationDelay="PT2S"
+		availabilityStartTime="2020-01-01T00:00:00Z"
+		minimumUpdatePeriod="PT4M"
+		timeShiftBufferDepth="PT6.0S">
+	<UTCTiming
+			schemeIdUri="urn:mpeg:dash:utc:direct:2014"
+			value="2020-01-01T01:00:00Z" />
+	<ServiceDescription id="0">
+		<Latency target="4000" />
+		<PlaybackRate max="1.04" min="0.96" />
+	</ServiceDescription>
+	<Period start="PT0.0S">
+		<AdaptationSet contentType="video">
+			<Representation id="0" mimeType="video/mp4">
+				<SegmentTemplate
+						timescale="1000000"
+						duration="2000000"
+						availabilityTimeOffset="2"
+						startNumber="1">
+				</SegmentTemplate>
+			</Representation>
+		</AdaptationSet>
+	</Period>
+</MPD>

testdata/src/test/assets/media/mpd/sample_mpd_live_with_offset_inside_window

+<?xml version="1.0" encoding="utf-8"?>
+<MPD
+		type="dynamic"
+		minimumUpdatePeriod="PT4M"
+		availabilityStartTime="2020-01-01T00:00:00Z"
+		timeShiftBufferDepth="PT6.0S">
+	<UTCTiming
+			schemeIdUri="urn:mpeg:dash:utc:direct:2014"
+			value="2020-01-01T01:00:00Z" />
+	<ServiceDescription id="0">
+		<Latency target="3000" />
+	</ServiceDescription>
+	<Period start="PT0.0S">
+		<AdaptationSet contentType="video">
+			<Representation id="0" mimeType="video/mp4">
+				<SegmentTemplate
+						timescale="1000000"
+						duration="2000000"
+						availabilityTimeOffset="2"
+						startNumber="1"/>
+			</Representation>
+		</AdaptationSet>
+	</Period>
+</MPD>

testdata/src/test/assets/media/mpd/sample_mpd_live_with_offset_too_long

+<?xml version="1.0" encoding="utf-8"?>
+<MPD
+		type="dynamic"
+		minimumUpdatePeriod="PT4M"
+		availabilityStartTime="2020-01-01T00:00:00Z"
+		timeShiftBufferDepth="PT16.0S">
+	<UTCTiming
+			schemeIdUri="urn:mpeg:dash:utc:direct:2014"
+			value="2020-01-01T00:00:20Z" />
+	<ServiceDescription id="0">
+		<Latency target="30000" />
+	</ServiceDescription>
+	<Period start="PT0.0S">
+		<AdaptationSet contentType="video">
+			<Representation id="0" mimeType="video/mp4">
+				<SegmentTemplate
+						timescale="1000000"
+						duration="2000000"
+						availabilityTimeOffset="2"
+						startNumber="1"/>
+			</Representation>
+		</AdaptationSet>
+	</Period>
+</MPD>

testdata/src/test/assets/media/mpd/sample_mpd_live_with_offset_too_short

+<?xml version="1.0" encoding="UTF-8"?>
+<MPD
+    type="dynamic"
+    timeShiftBufferDepth="PT16S"
+    minimumUpdatePeriod="PT4M"
+    availabilityStartTime="1970-01-01T00:00:00Z">
+  <!-- Now is 60 seconds after the start of the window. -->
+  <UTCTiming
+      schemeIdUri="urn:mpeg:dash:utc:direct:2014"
+      value="2020-01-01T00:01:00Z" />
+  <ServiceDescription id="0">
+    <Latency target="4000" />
+  </ServiceDescription>
+  <Period id="1" start="PT0S">
+    <AdaptationSet id="0" contentType="video">
+      <SegmentTemplate presentationTimeOffset="0" timescale="1000" startNumber="1">
+        <SegmentTimeline>
+          <!-- t = 2020-01-01T00:00:00Z (UTC) -->
+          <S t="1577836800000" d="4000" r="3"/>
+        </SegmentTimeline>
+      </SegmentTemplate>
+      <Representation id="0"/>
+    </AdaptationSet>
+  </Period>
+</MPD>

testdata/src/test/assets/media/mpd/sample_mpd_live_with_suggested_presentation_delay_2s

+<?xml version="1.0" encoding="utf-8"?>
+<MPD
+		type="dynamic"
+		suggestedPresentationDelay="PT2S"
+		minimumUpdatePeriod="PT4M"
+		availabilityStartTime="2020-01-01T00:00:00Z"
+		timeShiftBufferDepth="PT6.0S">
+	<UTCTiming
+			schemeIdUri="urn:mpeg:dash:utc:direct:2014"
+			value="2020-01-01T01:00:00Z" />
+	<Period start="PT0.0S">
+		<AdaptationSet contentType="video">
+			<Representation id="0" mimeType="video/mp4">
+				<SegmentTemplate
+						timescale="1000000"
+						duration="2000000"
+						availabilityTimeOffset="2"
+						startNumber="1">
+				</SegmentTemplate>
+			</Representation>
+		</AdaptationSet>
+	</Period>
+</MPD>

testdata/src/test/assets/media/mpd/sample_mpd_live_without_live_configuration

+<?xml version="1.0" encoding="utf-8"?>
+<MPD
+	type="dynamic"
+	minimumUpdatePeriod="PT4M"
+	availabilityStartTime="2020-01-01T00:00:00Z"
+	timeShiftBufferDepth="PT1M">
+	<UTCTiming
+			schemeIdUri="urn:mpeg:dash:utc:direct:2014"
+			value="2020-01-01T01:00:00Z" />
+	<Period start="PT0.0S">
+		<AdaptationSet contentType="video">
+			<Representation id="0" mimeType="video/mp4">
+				<SegmentTemplate
+						timescale="1000000"
+						duration="2000000"
+						availabilityTimeOffset="2"
+						startNumber="1">
+				</SegmentTemplate>
+			</Representation>
+		</AdaptationSet>
+	</Period>
+</MPD>