android.hardware.tests.foo@1.0::IFooCallback: use booleans

b/30853785 auto-generation for bools is broken

Change-Id: Ia1c1e1f03360d5c7e4162b24a83082bc833a8a34
Signed-off-by: Iliyan Malchev <malchev@google.com>
diff --git a/tests/foo/1.0/IFooCallback.hal b/tests/foo/1.0/IFooCallback.hal
index 0e34266..7b25df3 100644
--- a/tests/foo/1.0/IFooCallback.hal
+++ b/tests/foo/1.0/IFooCallback.hal
@@ -5,6 +5,6 @@
 interface IFooCallback {
     //heyItsMe(IFoo cb);
     heyItsYou(IFooCallback cb);
-    heyItsYouIsntIt(IFooCallback cb) generates (uint8_t yesOrNo);
+    heyItsYouIsntIt(IFooCallback cb) generates (bool yesOrNo);
     oneway heyItsTheMeaningOfLife(uint8_t tmol);
 };