fix : Update consent method implementation (#477)

The consent implementation for kits was not returning the current consent

Author: Mansi-mParticle

android-kit-base/src/main/java/com/mparticle/kits/FilteredMParticleUser.java

@@ -152,12 +152,12 @@ public boolean setUserTag(String tag) {
 
     @Override
     public ConsentState getConsentState() {
-        return null;
+        return mpUser.getConsentState();
     }
 
     @Override
     public void setConsentState(ConsentState state) {
-
+        mpUser.setConsentState(state);
     }
 
     @Override