libstagefright: add camera owners to Camera*.h

Change-Id: Ic1186c7412cc7c74ab2b044a055b3b7039d6efd5
diff --git a/media/libstagefright/OWNERS b/media/libstagefright/OWNERS
index f02e168..df61c29 100644
--- a/media/libstagefright/OWNERS
+++ b/media/libstagefright/OWNERS
@@ -9,3 +9,4 @@
 include platform/frameworks/av:/media/janitors/media_solutions_OWNERS
 
 per-file Camera*.cpp = file:/camera/OWNERS
+per-file Camera*.h = file:/camera/OWNERS