Move OWNERS from cas AIDL HAL to general cas folder

Test: N/A
Change-Id: I1fe535e1468e4dd238f238144dc4795d0089fd7c
diff --git a/cas/aidl/OWNERS b/cas/OWNERS
old mode 100755
new mode 100644
similarity index 100%
rename from cas/aidl/OWNERS
rename to cas/OWNERS