Read screenshot file from screenshotFiles array

Regression from merge issue that was created when merging ag/9489200 and ag/9502526.

Previously, before saving the screenshot file in the array, it had to be
created each time it was required.

Bug: 123617758
Test: manual
Change-Id: I2dc2924aa20609d2445af00025580b2752935903
1 file changed