Tuner Default HAL change dvr buffer size for CF

The default HAL currently uses a single shared memory
buffer to store the data within MediaEvents. This buffer
would cause sudden crashes when running on
cf_x86_tv-userdebug due to being de-allocated by the
memory management system. This CL decreases the size of
the buffer so our SampleTunerTIS can once again run
successfully on Cuttlefish.

Bug: 236847284
Test: Running sampletunertvinput manually on cuttlefish
Change-Id: I8e6042da422a9ed93cd9dbd18fe954c71098534d