Fix DumpUnattachedThreads logic for CTS.

The thread should not be in thread list when dumping from
DumpUnattachedThread.

Bug:140968481
Bug:188918448
Bug:188918454
Test: CtsWindowManagerDeviceTestCases android.server.wm.AnrTests

Signed-off-by: wangguibo <wangguibo@xiaomi.com>
Merged-In: Icc4c7907c5386280c04d8e56496361e32cbac350
Change-Id: Icc4c7907c5386280c04d8e56496361e32cbac350
(cherry picked from commit 530552ac735c59a3ae44b16f751df265e820dad2)
1 file changed