Add file-exclusion-filter-regex for hwuimicro

Using atest to test hwuimicro will get test error due to current
logic of GoogleBenchmarkTest will running all executable files under
input device path. But due to the test config also under that device
path which will break GoogleBenchmarkTest. Filter *.config file to
prevent breakage.

Bug: 129996310
Test: atest hwuimicro
Change-Id: I68b6c623ed30f75faf7801bc5a1d556107359573