Add EGL15: eglCreateImage, eglDestroyImage

Also change eglCreatePlatformPixmapSurface to throw an
unsupported extension rather than call the native function
which will return an error indicating it's unsupported.

Bug: 80297325
Test: atest CtsGraphicsTestCases:EGL15Test
Change-Id: I94f2d39678515fdacf9b2fccd1c531365930ad1b