[3.x] Fix flickering issues with low processor mode on Android

[m4gr3d]

As pointed out by @Relintai in #55604 (comment), the cause of the flickers when enabling low processor mode is that the framebuffers are swapped automatically even when nothing is rendered.

To resolve the issue, I forked GLSurfaceView so that the Godot Android logic can specify when the framebuffers should be swapped.

Fixes #19304

[m4gr3d]

@akien-mga Given we're forking two files, can we disable the static checks on them?

[akien-mga]

@akien-mga Given we're forking two files, can we disable the static checks on them?

You can add // clang-format off in the file and everything after the comment will not be formatted.

Make sure to identify the downstream changes clearly in those files so that we know what is Godot specific.

[m4gr3d]

@akien-mga Given we're forking two files, can we disable the static checks on them?

You can add // clang-format off in the file and everything after the comment will not be formatted.

Make sure to identify the downstream changes clearly in those files so that we know what is Godot specific.

@akien-mga Done!

[RandomShaper]

Nothing to say beyond what I've commented in the PR for 4.0.

[akien-mga]

Thanks!