Replace API level codename with number

This CL fixes a bug when Soong pass `-target` with a non-digit suffix in Clang. As mentioned in b/236753843, Clang's version parsing expects to see an integer in the target string so it ignores the
S suffix.

Test: m gwp_asan_crash_handler && make sure -target is aarch64-linux-androidS instead of aarch64-linux-android31
Test: go test -run ^TestNonDigitMinSdkVersionInClangTriple$ android/soong/cc
Bug: 236753843
Change-Id: I258ecc52083dbf3471d23cf310e0ad54440f1908
diff --git a/android/api_levels.go b/android/api_levels.go
index 8163894..41b338c 100644
--- a/android/api_levels.go
+++ b/android/api_levels.go
@@ -184,17 +184,9 @@
 // a core-for-system-modules.jar for the module-lib API scope.
 var LastWithoutModuleLibCoreSystemModules = uncheckedFinalApiLevel(31)
 
-// If the `raw` input is the codename of an API level has been finalized, this
-// function returns the API level number associated with that API level. If the
-// input is *not* a finalized codename, the input is returned unmodified.
-//
-// For example, at the time of writing, R has been finalized as API level 30,
-// but S is in development so it has no number assigned. For the following
-// inputs:
-//
-// * "30" -> "30"
-// * "R" -> "30"
-// * "S" -> "S"
+// ReplaceFinalizedCodenames returns the API level number associated with that API level
+// if the `raw` input is the codename of an API level has been finalized.
+// If the input is *not* a finalized codename, the input is returned unmodified.
 func ReplaceFinalizedCodenames(config Config, raw string) string {
 	num, ok := getFinalCodenamesMap(config)[raw]
 	if !ok {