Fix bug in creation of EffectHandle when out of memory

If there is insufficient client memory to create the EffectHandle,
it was returning a handle which would be useless.  Now it correctly
reports the out-of-memory error back to client.

Change-Id: I894e65d5d17df39383032c1527be6ccd35f578bb
diff --git a/services/audioflinger/Effects.h b/services/audioflinger/Effects.h
index b717857..50535a2 100644
--- a/services/audioflinger/Effects.h
+++ b/services/audioflinger/Effects.h
@@ -169,6 +169,7 @@
             const sp<IEffectClient>& effectClient,
             int32_t priority);
     virtual ~EffectHandle();
+    virtual status_t initCheck();
 
     // IEffect
     virtual status_t enable();