Update the default platform version to S

R is out. The platform codename on the main branch is now S and the API
level of the platform is 30, which is R because S hasn't been finalized.

Bug: N/A
Test: rm -rf out; ./build/soong/soong_ui.bash --make-mode --skip-make
Change-Id: I486b9639bccfe17a42681e1f84097373f8f401e7
diff --git a/android/variable.go b/android/variable.go
index 53f081e..ce523ed 100644
--- a/android/variable.go
+++ b/android/variable.go
@@ -365,12 +365,12 @@
 	*v = productVariables{
 		BuildNumberFile: stringPtr("build_number.txt"),
 
-		Platform_version_name:             stringPtr("Q"),
-		Platform_sdk_version:              intPtr(28),
-		Platform_sdk_codename:             stringPtr("Q"),
+		Platform_version_name:             stringPtr("S"),
+		Platform_sdk_version:              intPtr(30),
+		Platform_sdk_codename:             stringPtr("S"),
 		Platform_sdk_final:                boolPtr(false),
-		Platform_version_active_codenames: []string{"Q"},
-		Platform_vndk_version:             stringPtr("Q"),
+		Platform_version_active_codenames: []string{"S"},
+		Platform_vndk_version:             stringPtr("S"),
 
 		HostArch:                   stringPtr("x86_64"),
 		HostSecondaryArch:          stringPtr("x86"),