trusty:teeui: Add error message to help track down 'out of memory' errors. am: be41cb2966 am: 521f75cc08

Original change: https://android-review.googlesource.com/c/platform/system/teeui/+/2537970

Change-Id: I313c7c3300f5cb77974735343698f92a0aa543a0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>