Removes Nexus 5 from AEC and NS blacklists

BUG=b/27086464
R=tina.legrand@webrtc.org

Review URL: https://codereview.webrtc.org/1695713002 .

Cr-Commit-Position: refs/heads/master@{#11605}

webrtc/modules/audio_device/android/java/src/org/webrtc/voiceengine/WebRtcAudioUtils.java

@@ -40,7 +40,6 @@ public final class WebRtcAudioUtils {
   // bad and where it makes sense to avoid using it and instead rely on the
   // native WebRTC version instead. The device name is given by Build.MODEL.
   private static final String[] BLACKLISTED_AEC_MODELS = new String[] {
-      "Nexus 5",
       "D6503",      // Sony Xperia Z2 D6503
       "ONE A2005",  // OnePlus 2
   };
@@ -51,7 +50,6 @@ public final class WebRtcAudioUtils {
   private static final String[] BLACKLISTED_NS_MODELS = new String[] {
       "Nexus 10",
       "Nexus 9",
-      "Nexus 5",
       "ONE A2005",  // OnePlus 2
   };