Always pass arguments to INSTANTIATE_TEST_SUITE_P.

Passing an empty arg is working at the moment but it is not
guaranteed to continue to work in the future.

This CL has been generated with:
git grep -l "INSTANTIATE_TEST_SUITE_P(," | xargs sed -i \
    "s/INSTANTIATE_TEST_SUITE_P(,/INSTANTIATE_TEST_SUITE_P(All,/g"

Bug: None
Change-Id: Icd2fb9d9d29aed5d692a234124bd990d0f097db4
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/153890
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29282}

modules/video_coding/codecs/vp9/test/vp9_impl_unittest.cc

@@ -1248,7 +1248,7 @@ TEST_P(TestVp9ImplWithLayering, ExternalRefControl) {
   }
 }
 
-INSTANTIATE_TEST_SUITE_P(,
+INSTANTIATE_TEST_SUITE_P(All,
                          TestVp9ImplWithLayering,
                          ::testing::Combine(::testing::Values(1, 2, 3),
                                             ::testing::Values(1, 2, 3)));