Test for echoed interfaces.

Test: hidl_test

Bug: 33173166

Change-Id: I0b8b8553b7d3f7b1800d0970a9fc17d01084dfcf
diff --git a/tests/bar/1.0/IBar.hal b/tests/bar/1.0/IBar.hal
index 21c3473..5f94d07 100644
--- a/tests/bar/1.0/IBar.hal
+++ b/tests/bar/1.0/IBar.hal
@@ -17,9 +17,12 @@
 package android.hardware.tests.bar@1.0;
 
 import android.hardware.tests.foo@1.0::IFoo;
+import android.hardware.tests.foo@1.0::ISimple;
 import android.hardware.tests.foo@1.0::Abc;
 import android.hardware.tests.foo@1.0::Unrelated;
 
+import IComplicated;
+
 interface IBar extends android.hardware.tests.foo@1.0::IFoo {
 
     typedef android.hardware.tests.foo@1.0::IFoo FunkyAlias;
@@ -33,4 +36,6 @@
     expectNullHandle(handle h, Abc xyz) generates (bool hIsNull, bool xyzHasNull);
     takeAMask(BitField bf, bitfield<BitField> first, MyMask second, Mask third)
             generates (BitField bf, uint8_t first, uint8_t second, uint8_t third);
+
+    haveAInterface(ISimple i) generates (ISimple i);
 };