Increase debounce time for DISCONNECT processing

During composition switch, some host PCs are taking more
time in processing the disconnect of previous functions and
enumerating the new functions. This causes the delay in
receiving the CONNECTED uevent which triggers the fallback
to default composition. Prevent this by increasing the
debounce time from 1s to 3s (which is the average time
taken by these PCs to enumerate the new functions) for
device mode state update, while keeping the debounce time
for host mode as is at 1s.

Bug: 176779207
Test: Verified enumeration of device with the delay
Change-Id: I7ff58a1a9755939ccb26dad61969902ec91f2225