add event to sqlite changed

package.json

@@ -99,6 +99,7 @@
     "ng2-pdf-viewer": "^7.0.1",
     "ngx-socket-io": "^3.2.0",
     "pdfjs": "^2.4.6",
+    "pdfjs-dist": "^2.9.359",
     "puppeteer": "^10.1.0",
     "rxjs": "~6.6.3",
     "rxjs-compat": "^6.6.7",
@@ -191,7 +192,8 @@
     },
     "platforms": [
       "browser",
-      "ios"
+      "ios",
+      "android"
     ]
   },
   "main": "karma.conf.js",