Convert more versions in config to ApiLevel.

The test case I removed is invalid. The codename has had its int
assigned, but the config claims it is not final.

If this ever does need to be supported it's just a matter of making
sure the Q -> 29 mapping (or whatever) in the finalized codenames map
in android/api_levels.go.

Test: treehugger
Bug: http://b/154667674
Change-Id: I4f42ec2fd4a37750519ee3937938a1c65b6bb1e8

java/java.go

@@ -1658,7 +1658,7 @@ func (j *Module) compile(ctx android.ModuleContext, aaptSrcJar android.Path) {
 			if v := sdkSpec.version; v.isNumbered() {
 				return v.String()
 			} else {
-				return ctx.Config().DefaultAppTargetSdk()
+				return ctx.Config().DefaultAppTargetSdk(ctx).String()
 			}
 		}