Enable live DASH stream for IMA DAI

This change enables the IMA extension to play live DASH streams
with DAI support. Samples streams can be found and played in the
main demo app.

Issue: google/ExoPlayer#10912
#minor-release
PiperOrigin-RevId: 532407708
(cherry picked from commit 806f19c44dd3685be119bdc78e0e09f22fca13e1)

demos/main/src/main/assets/media.exolist.json

@@ -407,6 +407,18 @@
         "uri": "ssai://dai.google.com/?contentSourceId=2559737&videoId=tos-dash&format=0&adsId=1"
         "uri": "ssai://dai.google.com/?contentSourceId=2559737&videoId=tos-dash&format=0&adsId=1"
       },
       },
       {
       {
+        "name": "DASH live: Tears of Steel (mid), 3 ads each [10 s]",
+        "uri": "ssai://dai.google.com/?assetKey=jNVjPZwzSkyeGiaNQTPqiQ&format=0&adsId=1"
+      },
+      {
+        "name": "DASH live: New Tears of Steel (mid), 3 ads each [10 s]",
+        "uri": "ssai://dai.google.com/?assetKey=PSzZMzAkSXCmlJOWDmRj8Q&format=0&adsId=12"
+      },
+      {
+        "name": "DASH live: Unencrypted stream with 30s ad breaks every minute",
+        "uri": "ssai://dai.google.com/?assetKey=0ndl1dJcRmKDUPxTRjvdog&format=0&adsId=21"
+      },
+      {
         "name": "Playlist: No ads - HLS VOD: Demo (skippable pre/post) - No ads",
         "name": "Playlist: No ads - HLS VOD: Demo (skippable pre/post) - No ads",
         "playlist": [
         "playlist": [
           {
           {
@@ -435,20 +447,6 @@
         ]
         ]
       },
       },
       {
       {
-        "name": "Playlist: No ads - HLS Live: Big Buck Bunny (mid) - No ads",
-        "playlist": [
-          {
-            "uri": "https://html5demos.com/assets/dizzy.mp4"
-          },
-          {
-            "uri": "ssai://dai.google.com/?assetKey=sN_IYUG8STe1ZzhIIE_ksA&format=2&adsId=3"
-          },
-          {
-            "uri": "https://html5demos.com/assets/dizzy.mp4"
-          }
-        ]
-      },
-      {
         "name": "Playlist: No ads - DASH VOD: Tears of Steel (11 periods, pre/mid/post) - No ads",
         "name": "Playlist: No ads - DASH VOD: Tears of Steel (11 periods, pre/mid/post) - No ads",
         "playlist": [
         "playlist": [
           {
           {

extensions/ima/src/main/java/com/google/android/exoplayer2/ext/ima/ImaServerSideAdInsertionUriBuilder.java

@@ -379,10 +379,6 @@ public final class ImaServerSideAdInsertionUriBuilder {
     if (streamActivityMonitorId != null) {
     if (streamActivityMonitorId != null) {
       streamRequest.setStreamActivityMonitorId(streamActivityMonitorId);
       streamRequest.setStreamActivityMonitorId(streamActivityMonitorId);
     }
     }
-    checkState(
-        streamRequest.getFormat() != StreamFormat.DASH
-            || TextUtils.isEmpty(streamRequest.getAssetKey()),
-        "DASH live streams are not supported yet.");
     return streamRequest;
     return streamRequest;
   }
   }
 }
 }