Trigger GC and drop compiled code on low memory

Reviewed By: astreet

Differential Revision: D2658693

fb-gh-sync-id: 8cba49b67ac45a2dbf8b4c9c404d6fb9c97693f6

ReactAndroid/src/main/java/com/facebook/react/bridge/CatalystInstanceImpl.java

@@ -314,6 +314,11 @@ public class CatalystInstanceImpl implements CatalystInstance {
     return mJavaRegistry.getAllModules();
   }
 
+  @Override
+  public void handleMemoryPressure(MemoryPressure level) {
+    Assertions.assertNotNull(mBridge).handleMemoryPressure(level);
+  }
+
   /**
    * Adds a idle listener for this Catalyst instance. The listener will receive notifications
    * whenever the bridge transitions from idle to busy and vice-versa, where the busy state is