BufferPoolClient: Increase kReceiveTimeoutUs to 2000000

Increase BufferPoolClient's kReceiveTimeoutUs to 2000000 because
in some cts tests, such as
android.video.cts.VideoEncoderDecoderTest#testAvcGoog0Qual1920x1080
it has many CPU read with hardware's non-cacheable framebuffer,
this CPU read operation cost too much time and will lead to buffer
timeout in BufferPoolClient. BufferPoolClient shlould take it into
consideration and increase kReceiveTimeoutUs.

Bug: 153613044

Signed-off-by: xiahong.bao <xiahong.bao@nxp.com>
Change-Id: I79d4deafbd7c8af246a03a197e3215e4308a9453