The function EGL_CreatePlatformWindowSurface() was introduced by EGL
1.5 and is required by dEQP starting with 3.2.6. ANGLE has worked
around EGL_CreatePlatformWindowSurface() being unimplemented by
submitting conformance on 3.2.5, but Android's internal master uses
ToT dEQP so we need to implement this to pass CTS and enable SWANGLE
on CuttleFish.

Bug: b/157670307
Test: Android CtsDeqpTestCases, CQ
Change-Id: Ib21929701c7881a7dc3a22196e48139a5c8e2ddf
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2231247Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Tim Van Patten <timvp@google.com>