Bug 1156 Regression (Bug 1417): Probe whether 'eglGetPlatformDisplay(..)' is available before using

commit f4281b5ee80d7674134bfee357695a98382884a3 for Bug 1156 (DRM/GBM)
introduced the call to 'eglGetPlatformDisplay(..)' for known EGL-platforms.

However, 'eglGetPlatformDisplay(..)' is only available for EGL versions >= 1.5
or 'eglGetPlatformDisplayEXT(..)' if EGL extension 'EGL_EXT_platform_base' is available.

This patch adds a singular EGL version probe and a secondary extension fallback test
at first call using EGL_NO_DISPLAY on both EGL_VERSION and EGL_EXTENSION eglQueryString(..) calls.

If 'eglGetPlatformDisplay*(..)' is not available, simply use 'eglGetDisplay(..)'.

This regression also impacted Bug 1417 (Android bringup using current SDK + NDK),
i.e. disabled most Android devices as their EGL version is often 1.4.

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