[MOBILEAPPS-1654] Open in App pop-up implementation in android and iphone (#2889)

* Open in App pop up implementation

* review comments addressed

* unit test cases added for open-in-app component and aca-mobile-app-switcher-service and review comments addressed

* cspell changes

* test case build failing issue resolved

* review comments addressed of using specific type and void in functions that do not return anything

* remaining review comments fixed for type cases

* added check for ipad and ipod

* checkForIOSDevice function removed and checked for ios device in same line

* spacing issues addressed

* missing unit tests added and some review comments addressed

* app.config.json file updated

* removed configuration variables from default Readme file

* used only boolean instead of string conversion in app service file

* session storage name change

* review comments addressed

cspell.json

@@ -17,10 +17,12 @@
     "ngstack",
     "sidenav",
     "injectable",
+    "iosamw",
     "truthy",
     "cryptodoc",
     "mysites",
     "afts",
+    "androidamw",
     "classlist",
     "folderlink",
     "filelink",