Add phone call handling on the car screen

Incoming calls now show the caller (name via contacts, else number) on
the car UI with answer/decline, using a call screening service so the
car sees a call before it rings. Also adds pinnable nav bar shortcuts,
lowers minSdk to 31 for wider device support, and bumps to 0.0.04-pre.

settings.gradle.kts

@@ -25,4 +25,5 @@ dependencyResolutionManagement {
 
 rootProject.name = "Gearslip"
 include(":gearslip")
+include(":ksdump")