Fix partial heap usage in protected_memory android swapchain tests

Fix partial heap usage in protected_memory android swapchain tests

On devices with small amounts of protected memory, limitting usage to
25% of the total protected memory causes tests to be skipped. Tweak
to allow for full usage of the protected heap.

Affects:
dEQP-VK.protected_memory.interaction.wsi.android.swapchain.create.min_image_count
dEQP-VK.protected_memory.interaction.wsi.android.swapchain.create.image_format
dEQP-VK.protected_memory.interaction.wsi.android.swapchain.create.image_extent

Components: Vulkan

VK-GL-CTS Issue: 3296

Change-Id: I43c1cfc8d0e44d401952317158829f1a2da241a1