Code updated to run on SDK 33 and Gradle 7.5

[graffiti75]

Unfortunately this repo is not working anymore because the last time it was updated was 3 years ago.

• This repo is used on course "Android Kotlin Developer" of Udacity, more specifically on chapter "Advanced Android Apps with Kotlin - Part 2", class "5.2. Virtual Treasure Hunt with Geofences".
• As a Code Reviewer for the Android course in Udacity, in order to help students of this course, I decided to create this PR to update the repo.
• Between the requested changes, we have:
  • SDK version updated to version 33.
  • Gradle version updated to 7.5.
  • Dependencies updated on app/build.gradle.
  • Permission <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> added on AndroidManifest.xml.
  • Transformations.map removed from GeofenceViewModel.kt.