[sdk36][android] Update Gradle files for bare-expo, enable AndroidX (not yet working)

This updates the Gradle files in bare-expo so that they are similar to Gradle files for RN 0.61 projects. The ap

[sdk36][android] Update Gradle files for bare-expo, enable AndroidX (not yet working)

This updates the Gradle files in bare-expo so that they are similar to Gradle files for RN 0.61 projects. The app does not compile due to issue with dependencies like RNGH.

It also adds
```
android.useAndroidX=true
android.enableJetifier=true
```
to gradle.properties to enable AndroidX.

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