Changes need to implement heavy-weight gaming app tests.

We need to expose the CANT_SAVE_STATE importance for CTS to use.

I also found a serious issue with how instrumentation ApplicationInfo
is set up, where it doesn't have lots of important stuff like the
targetSdkVersion!  This is now fixed...  though ghod knows how this
will impact existing CTS tests, there could certainly be stuff relying
on code thinking it is running as targetSdk 0. :(

Finally delete the CantSaveState tests here, they are going to CTS.

Bug: 63937884
Test: ran new CTS tests
Change-Id: I42a73e0e83d799f8e5ff8ac4d4704a74ab5aab3e