chore: updated error consistency

Author: ethanneff

src/scripts/android/updateAndroidManifest.js

@@ -197,8 +197,8 @@
         intentFilterData.push(getAppLinkIntentFilterDictionary(alternate))
       } else if (linkDomain.indexOf('bnc.lt') !== -1) {
         // bnc.lt
-        if (preferences.androidPrefix == null) {
-          throw new Error('BRANCH SDK: Missing "android-prefix" in <branch-config> in your config.xml. Docs https://goo.gl/GijGKP')
+        if (preferences.androidPrefix === null) {
+          throw new Error('BRANCH SDK: Invalid "android-prefix" in <branch-config> in your config.xml. Docs https://goo.gl/GijGKP')
         }
         intentFilterData.push(getAppLinkIntentFilterDictionary(linkDomain, preferences.androidPrefix))
       } else {