[DeviceAware] Inline some calls to AppOpsCheckingService and remove some

methods from AppOpsService.Op and AppOpsService.UidState

This reduces the depth of call stack and removes some methods that need not be
under the aforementioned classes, as they aren't making use of the core
state maintained by the classes (ultimately AttributedOp instances).

Methods removed:

- UidState#getNonDefaultUidModes()
- UidState#getUidMode(int op)
- UidState#setUidMode(int op, int mode)
- Op#getMode()
- Op#setMode(@Mode int mode)

Bug: 299330771
Test: atest CtsAppOpsTestCases CtsAppOps2TestCases
Change-Id: I8d3a95ed4625195419b07beffbee10db2f0728a6