Revert recent r_submix patches

Revert "r_submix: Fix logspam on pipe corruption"
This reverts commit ab5b51838c94afc60f9979cdde2117930ef90ea9.
Revert "r_submix: Use intermediate pipe in non-blocking mode"
This reverts commit 1df8a0039ffaa5161e1ecdfda3ae3f7e5c7068c2.

Reason: breaks Android Auto projected mode

Bug: 74142786
Test: with Android Auto head unit simulator
Change-Id: I8e1bc146a131cb5b1ab88cf242b03a6b02a84339
(cherry picked from commit 16ad46ef48d037635b9a8c890b6c5845fbfaf00c)
2 files changed