feat: restore emulated geolocation data per user context after per context is removed (#1026)

Follow up after #1001

Align geolocation and screen orientation logic with other emulations.

Scenario:
1. Set some emulation per user context.
1. Set another emulation per browsing context.
1. Remove emulation per browsing context.

Current behavior: 
1. All emulations are removed from some emulation per user context

New behavior, aligned with other emulation's methods:
1. Some emulation per user context is still applied.

Author: sadym-chromium

index.bs

@@ -6170,7 +6170,11 @@ The [=remote end steps=] with |command parameters| are:
 
    1. For each |user context| of |user contexts|:
 
-      1. [=map/Set=] [=geolocation overrides map=][|user context|] to |emulated position data|.
+      1. If |emulated position data| is null, remove the |user context| from
+         [=geolocation overrides map=].
+
+      1. Otherwise, [=map/set=] [=geolocation overrides map=][|user context|] to
+         |emulated position data|.
 
       1. [=list/For each=] |top-level traversable| of the list of all [=/top-level traversables=]
          whose [=associated user context=] is |user context|:
@@ -6179,7 +6183,13 @@ The [=remote end steps=] with |command parameters| are:
 
 1. For each |navigable| of |navigables|:
 
-   1. [=Set emulated position data=] with |navigable| and |emulated position data|.
+   1. Let |user context| be |navigable|'s [=associated user context=].
+
+   1. If |emulated position data| is null and [=geolocation overrides map=] [=map/contains=]
+      |user context|, [=set emulated position data=] with |navigable| and
+      [=geolocation overrides map=][|user context|].
+
+   1. Otherwise, [=set emulated position data=] with |navigable| and |emulated position data|.
 
 1. Return [=success=] with data null.
 
@@ -6541,7 +6551,10 @@ The [=remote end steps=] with |command parameters| are:
 
    1. For each |user context| of |user contexts|:
 
-      1. [=map/Set=] [=screen orientation overrides map=][|user context|] to
+      1. If |emulated screen orientation| is null, [=map/remove=] |user context| from
+         [=screen orientation overrides map=].
+
+      1. Otherwise, [=map/set=] [=screen orientation overrides map=][|user context|] to
          |emulated screen orientation|.
 
       1. [=list/For each=] |top-level traversable| of the list of all
@@ -6552,7 +6565,13 @@ The [=remote end steps=] with |command parameters| are:
 
 1. For each |navigable| of |navigables|:
 
-   1. [=Set emulated screen orientation=] with |navigable| and
+   1. Let |user context| be |navigable|'s [=associated user context=].
+
+   1. If |emulated screen orientation| is null and [=screen orientation overrides map=]
+      [=map/contains=] |user context|, [=set emulated screen orientation=] with |navigable| and
+      [=screen orientation overrides map=][|user context|].
+
+   1. Otherwise, [=set emulated screen orientation=] with |navigable| and
       |emulated screen orientation|.
 
 1. Return [=success=] with data null.