Vulkan: Work-around Android start-up race condition

Work-around a race condition during Android start-up, while the
`service.sf.present_timestamp` property is asynchronously working its
way from HWC to other processes (especially render engine).  This can
cause the two successive calls to EnumerateDeviceExtensionProperties
to have different numbers of extensions.  That causes the second call
to return VK_INCOMPLETE, which can cause vkCreateDevice() to fail.
The work-around is to add 1 to the "count" returned by the first call.

Test: Manual test with additional logging
Bug: b/206733351
Change-Id: I7b29998d670196d2af772f19be30b2e9498acfe0