Disable lock and auto-rotate screen in InputMethodStressTest

Add DisableUnlockRule to disable lock screen. Add ScreenOrientationRule to disable auto-rotate screen and set the screen orientation to portrait before test starts.

Bug: 261775358

Test: atest com.android.inputmethod.stresstest.ImeOpenCloseStressTest
atest com.android.inputmethod.stresstest.AutoShowTest

Change-Id: Ic78194158f3c5f25397c696e3599289051a85df6