[WMS][Bugfix] Fix hang when dumping local window.

Problem:
Window dumping uses pipe for transfering data. This may
cause IO hang when dumping local window if buffer is full.

Solution:
Dump local window in IoThread's executor.

Bug: 267242455
Test: Manual && Monkey Test
Change-Id: I11043a79f03f7f71d0ca1daf8215580535a5d34d
1 file changed