Add collectAsState benchmarks

```
CollectAsStateBenchmark.collectAsStateWithLifecycle_add[count=1]
  timeNs            min 37,630.6,   median 38,984.4,   max 52,052.4
  Groups            min      0.0,   median      0.0,   max      0.0
  Slots             min      0.0,   median      0.0,   max      0.0
  allocationCount   min    231.4,   median    231.4,   max    231.4
    Trace
    Method Trace

CollectAsStateBenchmark.collectAsStateWithLifecycle_remove[count=1]
  timeNs            min 20,254.9,   median 20,780.1,   max 25,838.7
  Groups            min      0.0,   median      0.0,   max      0.0
  Slots             min      0.0,   median      0.0,   max      0.0
  allocationCount   min    106.1,   median    106.1,   max    106.1
    Trace
    Method Trace

CollectAsStateBenchmark.collectAsState_add[count=1]
  timeNs            min 19,253.3,   median 19,963.6,   max 31,291.0
  Groups            min      0.0,   median      0.0,   max      0.0
  Slots             min      0.0,   median      0.0,   max      0.0
  allocationCount   min    167.4,   median    167.4,   max    167.4
    Trace
    Method Trace

CollectAsStateBenchmark.collectAsState_remove[count=1]
  timeNs            min 7,007.4,   median 7,380.0,   max 9,968.7
  Groups            min     0.0,   median     0.0,   max     0.0
  Slots             min     0.0,   median     0.0,   max     0.0
  allocationCount   min    59.1,   median    59.1,   max    59.1
    Trace
    Method Trace
```

Test: They run
Change-Id: I669f8ef13226a81b2669747a81c4b6779aa49ac6