gralloc: Update get behaviour for interlaced metadata

If the interlaced metadata is not set, return standard metadata
value Interlaced_None instead of Interlaced_Qti.

Bug: 154573167
Test: VtsHalGraphicsMapperV4_0

Change-Id: Ib3ea47c1a6883bc6a8c4751f7309d7e76af7f851
1 file changed