The following PR adds the Advanced Marker Samples, showcasing the following functionality:

• Setting an iconView for the marker view.
• Using PinConfig to set the icon for AdvancedMarkerOptions.
• Changing the border color of an Advanced Marker.
• Setting Text Color using a Glyph.
• Creating a transparent Glyph.
• Collision Behavior.

Examples are provided in Java and Kotlin.

Before submitting your PR, there are a few things you can do to make sure it goes smoothly:

• Make sure to open a GitHub issue as a bug/feature request before writing your code! That way we can discuss the change, evaluate designs, and agree on the general idea
• Ensure the tests and linter pass
• Code coverage does not decrease (if any source code was changed)
• Appropriate docs were updated (if necessary)

Fixes #1434 🦕