useAndroidX and enableJetifier config in template gradle.properties (#24319)

Summary:
enable useAndroidX and enableJetifier that transforms non-Androidx third-party libraries to use AndroidX.

[Android] [Changed] - useAndroidX and enableJetifier config in template gradle.properties
Pull Request resolved: https://github.com/facebook/react-native/pull/24319

Differential Revision: D14822125

Pulled By: cpojer

fbshipit-source-id: 596a92f26fb06b077da507583b72af2b5abf712a

template/android/gradle.properties

@@ -16,3 +16,6 @@
 # This option should only be used with decoupled projects. More details, visit
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
 # org.gradle.parallel=true
+
+android.useAndroidX=true
+android.enableJetifier=true