graphics: add OWNERS file to default implementations

Test: none
Change-Id: I76a3c84a1fcb61dffa4641ec2120e484752bdf5b
diff --git a/graphics/allocator/2.0/default/OWNERS b/graphics/allocator/2.0/default/OWNERS
new file mode 100644
index 0000000..3aa5fa1
--- /dev/null
+++ b/graphics/allocator/2.0/default/OWNERS
@@ -0,0 +1,4 @@
+# Graphics team
+jessehall@google.com
+olv@google.com
+stoza@google.com
diff --git a/graphics/composer/2.1/default/OWNERS b/graphics/composer/2.1/default/OWNERS
new file mode 100644
index 0000000..3aa5fa1
--- /dev/null
+++ b/graphics/composer/2.1/default/OWNERS
@@ -0,0 +1,4 @@
+# Graphics team
+jessehall@google.com
+olv@google.com
+stoza@google.com
diff --git a/graphics/mapper/2.0/default/OWNERS b/graphics/mapper/2.0/default/OWNERS
new file mode 100644
index 0000000..3aa5fa1
--- /dev/null
+++ b/graphics/mapper/2.0/default/OWNERS
@@ -0,0 +1,4 @@
+# Graphics team
+jessehall@google.com
+olv@google.com
+stoza@google.com