ANDROID: dma-buf: align fd_flags and heap_flags with uapi

The signature of dma_heap_buffer_alloc() was updated to match the uapi
definition of 'struct dma_heap_allocation_data' as seen in [1].

Since in ACK we carry OOT patches that export this function and add
dma_heap_bufferfd_alloc(), equivalent updates are made in this patch.

Bug: 344501512
Cc: John Stultz <jstultz@google.com>
Cc: Hailong.Liu <hailong.liu@oppo.com>
Fixes: 8e1ec973 ("ANDROID: dma-heap: Provide accessors so that in-kernel drivers can allocate dmabufs from specific heaps")
Fixes: 349e8360 ("ANDROID: dma-heap: Rework allocation calls to return struct dma_buf instead of fd")
Link: https://lore.kernel.org/all/20240605012605.5341-1-21cnbao@gmail.com/

 [1]
Change-Id: Id27aa0970a06b51bebf00a6072baeff35f0d4358
Signed-off-by: Carlos Llamas <cmllamas@google.com>