sm8450-common: Add missing 32-bit libvmmem

32-bit display parts require it:
01-07 18:15:00.608  1854  6236 E qdgralloc: Could not load libvmmem: dlopen failed: library "libvmmem.so" not found

Change-Id: I82fd02d02c9024765369703a2a7f3de8069aa59b

proprietary-files.txt

@@ -928,6 +928,7 @@ vendor/lib64/[email protected]
 vendor/lib64/libminksocket_vendor.so
 
 # VM mem
+vendor/lib/libvmmem.so
 vendor/lib64/libvmmem.so
 
 # VM mgr