Disable ImageWallpaper related test due to EGL_BAD_CONTEXT error

We got EGL_BAD_CONTEXT error while running the tests, disable related
tests until we find the cause and fix the problem.

Bug: 177577356
Bug: 150449175
Test: atest com.android.systemui
Change-Id: I3fa1c999fc18c49a612f040f7041868b7ea67563