ART: Discard generated image in a low-memory environment

In case the available memory after image generation is low,
discard the image and continue in interpreted mode to mitigate
low-mem issues.

Bug: 17975190

(cherry picked from commit e059b778a6a471455659eb8c3616858eb189fda8)

Change-Id: I9bbb5e52ffbf3570f85510efb76bcd7654e6951c
1 file changed