SDK-1831 implement enableLogging

Author: echo-branch

BranchSDK/Branch.m

@@ -226,6 +226,11 @@ - (id)initWithInterface:(BNCServerInterface *)interface
     [self loadUserAgent];
 
     BranchJsonConfig *config = BranchJsonConfig.instance;
+    
+    if (config.enableLogging) {
+        [self enableLogging];
+    }
+    
     if (config.checkPasteboardOnInstall) {
         [self checkPasteboardOnInstall];
     }