Add GNSS AIDL interfaces (build/soong)

Bug: 159467682
Test: atest VtsHalGnssTargetTest
Change-Id: I4699eb8c9d73d56ba586896c65f0f8f7f9040dee
diff --git a/cc/config/vndk.go b/cc/config/vndk.go
index 578434b..30d10c5 100644
--- a/cc/config/vndk.go
+++ b/cc/config/vndk.go
@@ -19,6 +19,7 @@
 // has VndkUseCoreVariant set.
 var VndkMustUseVendorVariantList = []string{
 	"android.hardware.automotive.occupant_awareness-ndk_platform",
+	"android.hardware.gnss-unstable-ndk_platform",
 	"android.hardware.light-ndk_platform",
 	"android.hardware.identity-ndk_platform",
 	"android.hardware.nfc@1.2",