egl/android: bump the number of drmDevices to 64

It's the current maximum supported by the kernel. Stay consistent with
the rest of Mesa and use the same number.

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>

src/egl/drivers/dri2/platform_android.c

 static EGLBoolean
 droid_open_device(_EGLDisplay *disp)
 {
-#define MAX_DRM_DEVICES 32
+#define MAX_DRM_DEVICES 64
    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
    drmDevicePtr device, devices[MAX_DRM_DEVICES] = { NULL };
    int num_devices;