Allow all vkBeginCommandBuffer flags
Allow all vkBeginCommandBuffer flags

Our command buffer playback mechanism is safe for multiple inflight
submissions of the same command buffer, so there is nothing special to
do here.

The problematic case of needing to carry some state from a primary
command buffer into a secondary is already caught by the slightly later
check for pInheritanceInfo.

Bug: b/118619338
Change-Id: I782285fbc9127d59eeac7cbf79fea3f1952e3cde
Reviewed-on: https://swiftshader-review.googlesource.com/c/25950
Tested-by: Chris Forbes <c3279c50043e18e9442c1ae071cafa0e7a4ca967@google.com>
Reviewed-by: Hernan Liatis <aae823fecbd46cfee57ca49420b0f7c28a5fd12e@google.com>
Reviewed-by: Nicolas Capens <51edc787c30f24c4904e8ffbb5523c3a9f7a451d@google.com>
Kokoro-Presubmit: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>

google/swiftshader,google/swiftshader,bkaradzic/SwiftShader,bkaradzic/SwiftShader,bkaradzic/SwiftShader,bkaradzic/SwiftShader,google/swiftshader,bkaradzic/SwiftShader