Add way to use own FileProvider

[maximzhemerenko]

Please add ability to setup file provider authorities from the application.

[Mentix]

Hi, try to add this to manifest.

<provider
          android:name="android.support.v4.content.FileProvider"
          android:authorities="${applicationId}.easyphotopicker.fileprovider"
          android:exported="false"
          android:grantUriPermissions="true"
          tools:replace="android:authorities">
          <meta-data
              android:name="android.support.FILE_PROVIDER_PATHS"
              android:resource="@xml/file_paths"
              tools:replace="android:resource" />
      </provider>