Reproduction steps:
1) Open users attached project.
2) Go into playmode (if platform is set to Android do Edit>Graphics Emulation>No Emulation).
-At this point you should see image rendered on screen.
3) Build and run using Android devices that support ES3.1+AEP (With Mali GPU!)
-Notice nothing gets rendered on screen.

Logcats in the description for Samsung galaxy S6 and S7

Note: in logcats these parameters are listed as supported.
GL_ANDROID_extension_pack_es31a
GL_EXT_geometry_shader
Note 2: Unable to build for Galaxy S7 with Unity 5.4 - error that it doesn't support ES3.1

Reproduced with: 5.4.0b13, 5.3.4p1, 5.2.4f1, 5.1.4f1

DUT:
Galaxy S6 (Mali-T760) Android 5.1.1 - repro.
Galaxy S7 (Mali-T880) Android 6.0.1 - repro.
Google Nexus 9 (ULP MP192) Android 6.0.1 - no repro.
Galaxy Note 4 (Adreno 420) Android 5.1.1 - no repro.
Galaxy S7 (Adreno 530) Android 6.0.1 - no repro.