Do not allow wildcard matching in GL loader.

Previously when ro.hardware.egl and ro.board.platform were not set, the
loader would attempt to load the exact GLES drivers, and if it failed,
it would attempt to use wildcard matching to find the GLES drivers.

However, ro.hardware.egl must be set to point to the GLES drivers and
hence wildcard matching should be disallowed. This patch makes sure the
GL loader no longer uses that path if a device is launched in Android 14
and beyond.

Bug: b/277100371
Test: boot
Test: atest CtsAngleIntegrationHostTestCases
Change-Id: Ie9221ba37947c7462de8321819543a4c67979f67