Update comments about why ActualValueInference might not load.

`ActualValueInference`+ASM has been the default for Android builds inside Google (cl/492596588) and for external builds (cl/336875929) for a while now. It's still possible for users to manually exclude ASM or to run an optimizer that removes `ActualValueInference` (and ASM along with it). This CL attempts to make that clearer.

RELNOTES=n/a
PiperOrigin-RevId: 693057392

core/src/main/java/com/google/common/truth/Platform.java

@@ -108,8 +108,8 @@ static void cleanStackTrace(Throwable throwable) {
         | LinkageError
         | RuntimeException e) {
       // Some possible reasons:
-      // - Inside Google, we omit ActualValueInference entirely under Android.
-      // - Outside Google, someone is running without ASM on the classpath.
+      // - Someone has omitted ASM from the classpath.
+      // - An optimizer has stripped ActualValueInference (though it's unusual to optimize tests).
       // - There's a bug.
       // - We don't handle a new bytecode feature.
       // TODO(cpovirk): Log a warning, at least for non-ClassNotFoundException, non-LinkageError?