Wait for DRM keys before codec configuration on FireOS devices

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=201695876

library/core/src/main/java/com/google/android/exoplayer2/mediacodec/MediaCodecRenderer.java

@@ -369,6 +369,15 @@ public abstract class MediaCodecRenderer extends BaseRenderer {
         wrappedMediaCrypto = mediaCrypto.getWrappedMediaCrypto();
         drmSessionRequiresSecureDecoder = mediaCrypto.requiresSecureDecoderComponent(mimeType);
       }
+      if (deviceNeedsDrmKeysToConfigureCodecWorkaround()) {
+        @DrmSession.State int drmSessionState = drmSession.getState();
+        if (drmSessionState == DrmSession.STATE_ERROR) {
+          throw ExoPlaybackException.createForRenderer(drmSession.getError(), getIndex());
+        } else if (drmSessionState != DrmSession.STATE_OPENED_WITH_KEYS) {
+          // Wait for keys.
+          return;
+        }
+      }
     }
 
     if (codecInfo == null) {
@@ -1209,6 +1218,16 @@ public abstract class MediaCodecRenderer extends BaseRenderer {
     return false;
   }
 
+  /**
+   * Returns whether the device needs keys to have been loaded into the {@link DrmSession} before
+   * codec configuration.
+   */
+  private boolean deviceNeedsDrmKeysToConfigureCodecWorkaround() {
+    return "Amazon".equals(Util.MANUFACTURER)
+        && ("AFTM".equals(Util.MODEL) // Fire TV Stick Gen 1
+            || "AFTB".equals(Util.MODEL)); // Fire TV Gen 1
+  }
+
   /**
    * Returns whether the decoder is known to fail when flushed.
    * <p>