Interpret CRT object's min_sdk_version with ApiLevel

min_sdk_version values should be interpreted before use.

Bug: n/a
Test: m (in REL)
Change-Id: Ia45f5c7aeb4efcd8daef1deaf54f333dcdd1379d

cc/cc.go

@@ -1970,9 +1970,13 @@ func GetCrtVariations(ctx android.BottomUpMutatorContext,
 		if minSdkVersion == "" || minSdkVersion == "apex_inherit" {
 			minSdkVersion = m.SdkVersion()
 		}
+		apiLevel, err := android.ApiLevelFromUser(ctx, minSdkVersion)
+		if err != nil {
+			ctx.PropertyErrorf("min_sdk_version", err.Error())
+		}
 		return []blueprint.Variation{
 			{Mutator: "sdk", Variation: "sdk"},
-			{Mutator: "version", Variation: minSdkVersion},
+			{Mutator: "version", Variation: apiLevel.String()},
 		}
 	}
 	return []blueprint.Variation{