Add small timeout for DeviceConfig changes to propagate

This timeout ensures that the DeviceConfig changes have
propagated before the beginning of the test. This ensures
that the precondition that the device is ready to reboot is valid.
Moves the DeviceConfig initialization to @BeforeClass, since they
only need to be set once.

Test: atest CtsRebootReadinessTestCases
Bug: 191713386
Change-Id: If9f460715de70cc21be8cf7dae2bdbd3e0c3dc8a
1 file changed
tree: 6247127dee58318c17444346d0d19c508e00ea3e
  1. apex/
  2. framework/
  3. service/
  4. tests/
  5. OWNERS
  6. PREUPLOAD.cfg