* feat: copies some snippets that were in v3 only to gms
chore: the java compatibility version
* fix: updates copyright dates and adds missing copyright
* fix: copyright header for strings.xml
* fix: set Java Version back to 17
* fix: set Java Version back to 17
* fix: set Java Version back to 17
* fix: set Java Version back to 17
* fix: set Java Version back to 17
* feat: creates AdvancedMarkersCollisionActivity to demonstrate marker collision behavior
* chore: not adding jar files in libs directory
* feat: set Java 21 everywhere
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Co-authored-by: Enrique López Mañas <eenriquelopez@gmail.com>