[fenix] For https://github.com/mozilla-mobile/fenix/issues/24618 - Replace a Mockito mock with a Mockk mock

And in such fix seemingly intermittently failing tests preventing the merge.

app/src/test/java/org/mozilla/fenix/home/recentvisits/HistoryMetadataMiddlewareTest.kt

@@ -25,7 +25,6 @@ import mozilla.components.browser.state.store.BrowserStore
 import mozilla.components.concept.engine.history.HistoryItem
 import mozilla.components.concept.storage.HistoryMetadataKey
 import mozilla.components.support.test.ext.joinBlocking
-import mozilla.components.support.test.mock
 import org.junit.Assert.assertEquals
 import org.junit.Assert.assertNull
 import org.junit.Before
@@ -760,7 +759,7 @@ class HistoryMetadataMiddlewareTest {
                     SearchEngine(
                         id = "google",
                         name = "Google",
-                        icon = mock(),
+                        icon = mockk(),
                         type = SearchEngine.Type.BUNDLED,
                         resultUrls = listOf("https://google.com?q={searchTerms}")
                     )

app/src/test/java/org/mozilla/fenix/telemetry/TelemetryMiddlewareTest.kt

@@ -19,7 +19,6 @@ import mozilla.components.browser.state.store.BrowserStore
 import mozilla.components.service.glean.testing.GleanTestRule
 import mozilla.components.support.base.android.Clock
 import mozilla.components.support.test.ext.joinBlocking
-import mozilla.components.support.test.mock
 import mozilla.components.support.test.robolectric.testContext
 import mozilla.components.support.test.rule.MainCoroutineRule
 import org.junit.After
@@ -287,7 +286,7 @@ class TelemetryMiddlewareTest {
         store.dispatch(
             EngineAction.LinkEngineSessionAction(
                 tabId = "foreground",
-                engineSession = mock()
+                engineSession = mockk(relaxed = true)
             )
         ).joinBlocking()
 
@@ -324,7 +323,7 @@ class TelemetryMiddlewareTest {
         store.dispatch(
             EngineAction.LinkEngineSessionAction(
                 tabId = "background_pocket",
-                engineSession = mock()
+                engineSession = mockk(relaxed = true)
             )
         ).joinBlocking()