Allow having MMAP and MMAP offload simultaneously.

When finding endpoint, the performance mode should also be considered as
different performance mode is considered as an unmatch.

Bug: 425311458
Test: atest AAudioTests
Test: start MMAP and MMAP offload simultaneously
Flag: EXEMPT bugfix
Change-Id: I1da5370f531b1b4c1925cc6cca6f132757f47fad