Print ImplementationANDROID extensions as well

Test: adb shell /system/bin/test-opengl-gl2_basic
      Now includes extension list from
      eglQueryStringImplementationANDROID
Bug: 29940137

Merged-In: I7aae05f7dbc07a17f9d35fe93f929d9dfd8f0d55
Change-Id: I7aae05f7dbc07a17f9d35fe93f929d9dfd8f0d55
(cherry picked from commit e29ff8f9)