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On some Mali gpus glTexSubImage fails for egl siblings with R8 format.
Before we experienced that on NVidia gpu we get memory corruption after
deleting source texture.

This CL modifies NVidia workaround to not only keep source texture
alive but also use it if we're on the same context and enables it on
all Android devices to be closer to MailboxManagerSync behavior be had
before threaded shared images.

Bug: 1117370
Change-Id: Ia93badb27bbb23146ec348598821f66ad9b9f15d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2390861Reviewed-by: Peng Huang <penghuang@chromium.org>
Commit-Queue: Vasiliy Telezhnikov <vasilyt@chromium.org>
Cr-Commit-Position: refs/heads/master@{#803936}