How to hide "Navigation" and "GPS Pointer" buttons when I click the marker on the android google map

For the button group you have outlined in red, you can disable it using the setMapToolbarEnabled() method in UISettings.

From the documentation:

Sets the preference for whether the Map Toolbar should be enabled or disabled. If enabled, users will see a bar with various context-dependent actions, including 'open this map in the Google Maps app' and 'find directions to the highlighted marker in the Google Maps app'.

Code example to disable the two buttons with Java:

//Disable Map Toolbar:
mMap.getUiSettings().setMapToolbarEnabled(false);

Just in case you were also wondering about the zoom buttons, you can disable them like this with Java:

mMap.getUiSettings().setZoomControlsEnabled(false);

In Kotlin you can use property access syntax:

mMap.uiSettings.isMapToolbarEnabled = false
mMap.uiSettings.isZoomControlsEnabled = false