Revert "Increase performance for screenshots by pre-loading the buffer"

This reverts commit 957f7b377c39f214e61d6a8bac3a151fb63c1e77.

Reason for revert: memory leak (see b/184564947)

Bug: 184564947
Change-Id: I0ac8a2cdc33f83a5b2315232177b5b1d7bd35bbe
4 files changed