VintfObject::Get* respect skipCache for error case.

If skipCache is false and an object cannot be retrieved,
do not attempt to open and parse the file at the second time.

Test: no duplicated message for the same process:
"Cannot open /odm/manifest.xml"

Change-Id: I6f96ef4c4de39a1ebaf07025a7cdc51809fbee40
Fixes: 71504062
1 file changed