Limit retry-on-error to IllegalStateException

MediaCodec errors always trigger IllegalStateException or a subtype
(like MediaCodec.CodecException).

In practice, this avoids to retry if the error is caused by an
IOException when writing the video packet to the socket.

server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java

@@ -99,7 +99,7 @@ public class ScreenEncoder implements Device.RotationListener {
                     alive = encode(codec, fd);
                     // do not call stop() on exception, it would trigger an IllegalStateException
                     codec.stop();
-                } catch (Exception e) {
+                } catch (IllegalStateException e) {
                     Ln.e("Encoding error: " + e.getClass().getName() + ": " + e.getMessage());
                     if (!downsizeOnError || firstFrameSent) {
                         // Fail immediately