SERXIONE-1363: nplb SbMediaCanPlayMimeAndKeySystem validate performance failure

Reason for change: key/mime type caching enabled.
Test Procedure: refer ticket.
Risks: None
Priority: P1
Signed-off-by: sramul630 <sunil_ramulu@comcast.com>

Change-Id: Ic090fcf1d3fa80c122b9f55a19a9e80f28c32f67