io32 devicelab tests constantly failed installing apps #64753
Description
An example failure message is
2020-08-27T12:42:53.892434: Task failed: DeviceException: No connected iOS devices found.2020-08-27T12:42:53.892714:
According to @CareF 's investigation, this caused about 10% flakiness in flutter_gallery__transition_perf_e2e_ios32 and flutter_gallery_ios32__transition_perf.
See #64748 (comment) for a related discussion.