Fix the logic to get the max supported encoding level.

On some Android devices, the return value of

```
MediaCodecInfo.getCapabilitiesForType(mimeType).profileLevels
```

contains one entry for each encoding profile, like <profile, maxSupportedLevel>

but on some other devices, there are multiple entries for the same profile,

like <HIGH_PROFILE, LEVEL1>, <HIGH_PROFILE, LEVEL2>, <HIGH_PROFILE, LEVEL3>,
where we need to iterate through all the entries and find the max.

PiperOrigin-RevId: 427727030

libraries/transformer/src/main/java/androidx/media3/transformer/EncoderUtil.java

@@ -16,6 +16,7 @@
 
 package androidx.media3.transformer;
 
+import static java.lang.Math.max;
 import static java.lang.Math.round;
 
 import android.media.MediaCodec;
@@ -127,12 +128,13 @@ public final class EncoderUtil {
     MediaCodecInfo.CodecProfileLevel[] profileLevels =
         encoderInfo.getCapabilitiesForType(mimeType).profileLevels;
 
+    int maxSupportedLevel = LEVEL_UNSET;
     for (MediaCodecInfo.CodecProfileLevel profileLevel : profileLevels) {
       if (profileLevel.profile == profile) {
-        return profileLevel.level;
+        maxSupportedLevel = max(maxSupportedLevel, profileLevel.level);
       }
     }
-    return LEVEL_UNSET;
+    return maxSupportedLevel;
   }
 
   /**