dspmanager: Catch ALL the exceptions!

 * There are very few times where catching Exception is appropriate, but
   in this case it's appropriate to do four times in a row. Due to
   various issues with device switching and other weirdness, an effect
   might fail to set. Let's just hide it instead of crashing the app.

Change-Id: Icedc3493e88a23189c62f560a72f4fb7b2eb462b