Support List<IBinder> in NDK

With the support of IBinder[], List<IBinder> can be supported as well.

Moved some IBinder-related tests from ICppJavaTests to ITestService.

Bug: n/a
Test: aidl_integration_test
Change-Id: I14446f51cd8aaa51f42ae03908b52284def5890a
diff --git a/aidl_unittest.cpp b/aidl_unittest.cpp
index ec9b7a8..7e33e6b 100644
--- a/aidl_unittest.cpp
+++ b/aidl_unittest.cpp
@@ -4711,7 +4711,7 @@
     {"rust_StringArray", "List of arrays is not supported."},
     {"cpp_IBinder", ""},
     {"java_IBinder", ""},
-    {"ndk_IBinder", "List<IBinder> is not supported. List in NDK doesn't support IBinder."},
+    {"ndk_IBinder", ""},
     {"rust_IBinder", ""},
     {"cpp_ParcelFileDescriptor", ""},
     {"java_ParcelFileDescriptor", ""},