chore: Update Places SDK for Android to 4.1.0

[dkhawk]

This commit updates the Places SDK for Android to version 4.1.0 and updates the project to use the latest Android Gradle Plugin and Kotlin version.

• Updated Places SDK for Android to 4.1.0
• Updated Android Gradle Plugin to 8.7.3
• Updated Kotlin to 2.0.21
• Updated Gradle wrapper to 8.11.1
• Updated various dependencies to their latest versions
• Updated Java language version to 21
• Fixed deprecated Place.Field.LAT_LNG to Place.Field.LOCATION
• Removed unnecessary imports and variables
• Improved code readability and consistency
• Updated documentation and comments

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Fixes #<issue_number_goes_here> 🦕

[snippet-bot[bot]]

Here is the summary of changes.

You are about to delete 1 region tag.

• snippets/app/src/main/java/com/google/places/PlaceAutocompleteActivity.java:60, tag maps_places_get_started

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