eglGetFrameTimestamps: Consider timestamps of 0 as invalid.
eglGetFrameTimestamps: Consider timestamps of 0 as invalid.

There's a bug in the kernel that doesn't merge fences properly,
resulting in "reads done" timestamps of 0 when the fences being
merged have already signaled.

This is a temporary relaxation of the test requirements until
the kernel fix is required.

Bug: 68811985
Test: --deqp-case=dEQP-EGL*get_frame_timestamps*
Change-Id: I5f7e56e3a0c9808237a1ebc3787cf788feef1a79

googlestadia/VK-GL-CTS,KhronosGroup/Vulkan-CTS,KhronosGroup/VK-GL-CTS,googlestadia/VK-GL-CTS,googlestadia/VK-GL-CTS,KhronosGroup/Vulkan-CTS,KhronosGroup/Vulkan-CTS,googlestadia/VK-GL-CTS,googlestadia/VK-GL-CTS,KhronosGroup/Vulkan-CTS,KhronosGroup/Vulkan-CTS,KhronosGroup/VK-GL-CTS,KhronosGroup/VK-GL-CTS,KhronosGroup/VK-GL-CTS,googlestadia/VK-GL-CTS,KhronosGroup/Vulkan-CTS,KhronosGroup/VK-GL-CTS,KhronosGroup/VK-GL-CTS