[CHORE] Updated initialize callback to execute `webview.sendJavascript` to client.
[CHORE] Updated initialize callback to execute `webview.sendJavascript` to client.

BranchMetrics/Cordova-Ionic-PhoneGap-Deferred-Deep-Linking-SDK,BranchMetrics/cordova-ionic-phonegap-branch-deep-linking,BranchMetrics/cordova-ionic-phonegap-branch-deep-linking,BranchMetrics/Cordova-Ionic-PhoneGap-Deferred-Deep-Linking-SDK,BranchMetrics/cordova-ionic-phonegap-branch-deep-linking,BranchMetrics/Cordova-Ionic-PhoneGap-Deferred-Deep-Linking-SDK,BranchMetrics/cordova-ionic-phonegap-branch-deep-linking,BranchMetrics/Cordova-Ionic-PhoneGap-Deferred-Deep-Linking-SDK,BranchMetrics/cordova-ionic-phonegap-branch-deep-linking