Launch all activities into the same windowingMode

similar as 7e3fb8e7(Launch all activities into the same display)
when multiple activities are launched through a PendingIntent,
all activities need to be launched onto the same windowing mode.
that should be expected by caller, otherwise maybe the last activity is
freeform, others is fullscreen

Bug: 330548232
Change-Id: I188f79ef230cf142fec852fa73e7d422db417541
Test: manual test
Signed-off-by: Shuiqiang Wu <wusq8@motorola.com>