chore: resolve issue with missing typings

Depending on the version of tns-platform-declations (in src's devDependencies) only one of the following is available:
- androidx.core.content - when the version is at least 6.0.0
- android.support.v4.content - when the version is before 6.0.0

Author: tgpetrov

src/camera.android.ts

@@ -12,7 +12,7 @@ declare let global: any;
 let useAndroidX = function () {
     return global.androidx && global.androidx.appcompat;
 };
-const FileProviderPackageName = useAndroidX() ? global.androidx.core.content : android.support.v4.content;
+const FileProviderPackageName = useAndroidX() ? global.androidx.core.content : global.android.support.v4.content;
 
 export let takePicture = function (options?): Promise<any> {
     return new Promise((resolve, reject) => {