Firestore Query Warning with "price" equality filter and OrderBy set to the same "price" field

Following warning is reported by our custom `FirestoreAdapter`, when a user chooses to **filter by a particular _price_** and then **sorts the results by _price_** in the **Filter Dialog**-
```
2021-03-21 23:29:04.761 7574-7574/? W/FirestoreAdapter: onEvent:error
com.google.firebase.firestore.o: INVALID_ARGUMENT: Order by clause cannot contain a field with an equality filter price
at com.google.firebase.firestore.p0.b0.k(Unknown Source:22)
at com.google.firebase.firestore.k0.o.b(Unknown Source:30)
at com.google.firebase.firestore.k0.o0.r(Unknown Source:41)
at com.google.firebase.firestore.k0.o0.c(Unknown Source:83)
at com.google.firebase.firestore.k0.g0$b.c(Unknown Source:6)
at com.google.firebase.firestore.o0.m0.D(Unknown Source:69)
at com.google.firebase.firestore.o0.m0.s(Unknown Source:55)
at com.google.firebase.firestore.o0.m0.d(Unknown Source:0)
at com.google.firebase.firestore.o0.m0$a.e(Unknown Source:2)
at com.google.firebase.firestore.o0.t0.u(Unknown Source:21)
at com.google.firebase.firestore.o0.t0.n(Unknown Source:2)
at com.google.firebase.firestore.o0.b$c.g(Unknown Source:42)
at com.google.firebase.firestore.o0.d.run(Unknown Source:4)
at com.google.firebase.firestore.o0.b$a.a(Unknown Source:21)
at com.google.firebase.firestore.o0.b$c.d(Unknown Source:6)
at com.google.firebase.firestore.o0.t$a.c(Unknown Source:2)
at e.a.k1.p$e$b.b(Unknown Source:40)
at e.a.k1.p$e$b.a(Unknown Source:18)
at e.a.k1.x.run(Unknown Source:6)
at e.a.k1.z1.run(Unknown Source:11)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:462)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:301)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at com.google.firebase.firestore.p0.g$c$b.run(Unknown Source:15)
at java.lang.Thread.run(Thread.java:929)
Caused by: e.a.e1: INVALID_ARGUMENT: Order by clause cannot contain a field with an equality filter price
at e.a.d1.c(Unknown Source:2)
at com.google.firebase.firestore.p0.b0.k(Unknown Source:0)
at com.google.firebase.firestore.k0.o.b(Unknown Source:30) 
at com.google.firebase.firestore.k0.o0.r(Unknown Source:41) 
at com.google.firebase.firestore.k0.o0.c(Unknown Source:83) 
at com.google.firebase.firestore.k0.g0$b.c(Unknown Source:6) 
at com.google.firebase.firestore.o0.m0.D(Unknown Source:69) 
at com.google.firebase.firestore.o0.m0.s(Unknown Source:55) 
at com.google.firebase.firestore.o0.m0.d(Unknown Source:0) 
at com.google.firebase.firestore.o0.m0$a.e(Unknown Source:2) 
at com.google.firebase.firestore.o0.t0.u(Unknown Source:21) 
at com.google.firebase.firestore.o0.t0.n(Unknown Source:2) 
at com.google.firebase.firestore.o0.b$c.g(Unknown Source:42) 
at com.google.firebase.firestore.o0.d.run(Unknown Source:4) 
at com.google.firebase.firestore.o0.b$a.a(Unknown Source:21) 
at com.google.firebase.firestore.o0.b$c.d(Unknown Source:6) 
at com.google.firebase.firestore.o0.t$a.c(Unknown Source:2) 
at e.a.k1.p$e$b.b(Unknown Source:40) 
at e.a.k1.p$e$b.a(Unknown Source:18) 
at e.a.k1.x.run(Unknown Source:6) 
at e.a.k1.z1.run(Unknown Source:11) 
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:462) 
at java.util.concurrent.FutureTask.run(FutureTask.java:266) 
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:301) 
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) 
at com.google.firebase.firestore.p0.g$c$b.run(Unknown Source:15) 
at java.lang.Thread.run(Thread.java:929) 
```

Looks like we need to disable the sort option on _price_ when a particular _price_ is selected by the user.