Add sub-folder OWNERs

All of these OWNER files have `set noparent` because this project
doesn't have any cohesive ownership.

Bug: None
Change-Id: I9f7b8f03e7f27165e914fc6915bb02ef0a1d0144
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crostestutils/+/1970792
Reviewed-by: Sean Abraham <seanabraham@chromium.org>
Reviewed-by: Dhanya Ganesh <dhanyaganesh@chromium.org>
Reviewed-by: Aviv Keshet <akeshet@chromium.org>
Tested-by: Prathmesh Prabhu <pprabhu@chromium.org>
Tested-by: Sean Abraham <seanabraham@chromium.org>
Commit-Queue: Sean Abraham <seanabraham@chromium.org>
diff --git a/au_test_harness/OWNERS b/au_test_harness/OWNERS
new file mode 100644
index 0000000..8329ab1
--- /dev/null
+++ b/au_test_harness/OWNERS
@@ -0,0 +1,6 @@
+set noparent
+
+dhanyaganesh@chromium.org
+dhanyaganesh@google.com
+seanabraham@chromium.org
+seanabraham@google.com
diff --git a/devmode-test/OWNERS b/devmode-test/OWNERS
new file mode 100644
index 0000000..8329ab1
--- /dev/null
+++ b/devmode-test/OWNERS
@@ -0,0 +1,6 @@
+set noparent
+
+dhanyaganesh@chromium.org
+dhanyaganesh@google.com
+seanabraham@chromium.org
+seanabraham@google.com
diff --git a/provingground/OWNERS b/provingground/OWNERS
new file mode 100644
index 0000000..d4f1017
--- /dev/null
+++ b/provingground/OWNERS
@@ -0,0 +1,5 @@
+set noparent
+
+kathrelkeld@chromium.org
+kmshelton@chromium.org
+twreid@google.com