Don't re-init codec if DRM session is unchanged

This condition is trying to detect when it might be necessary
to switch from a non-secure to a secure codec. This is not
possible if the DRM session is unchanged, unless a different
codec is required for some other reason (e.g., H264 -> H265),
which is anyway handled by canKeepCodec below.

PiperOrigin-RevId: 292909126

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

@@ -1246,7 +1246,7 @@ public abstract class MediaCodecRenderer extends BaseRenderer {
 
     if ((sourceDrmSession == null && codecDrmSession != null)
         || (sourceDrmSession != null && codecDrmSession == null)
-        || (sourceDrmSession != null
+        || (sourceDrmSession != codecDrmSession
             && !codecInfo.secure
             && maybeRequiresSecureDecoder(sourceDrmSession, newFormat))
         || (Util.SDK_INT < 23 && sourceDrmSession != codecDrmSession)) {