Increase clipboard test timeout.

The auto cf is slow in opening the new activity for test.
Test is flaky because of timeouts, increase timeout from 3s to 5s to reduce flakyness.

Bug: 424168538
Test: atest CtsVirtualDevicesAppLaunchTestCases:android.virtualdevice.cts.applaunch.StreamedAppClipboardTest#customPolicy_defaultDeviceAppCanReadVirtualDeviceClipboard --iterations 20
Flag: TEST_ONLY
Change-Id: Ide8e77182b38db4a132c0becbed10e8f5eff120a