Fix incoming call notification content (related to #4225)

Author: bmarty

libraries/push/impl/src/main/kotlin/io/element/android/libraries/push/impl/notifications/CallNotificationEventResolver.kt

@@ -68,7 +68,7 @@ class DefaultCallNotificationEventResolver @Inject constructor(
                     noisy = true,
                     timestamp = this.timestamp,
                     senderDisambiguatedDisplayName = getDisambiguatedDisplayName(content.senderId),
-                    body = "☎️ ${stringProvider.getString(R.string.notification_incoming_call)}",
+                    body = stringProvider.getString(R.string.notification_incoming_call),
                     roomName = roomDisplayName,
                     roomIsDm = isDm,
                     roomAvatarPath = roomAvatarUrl,

libraries/push/impl/src/test/kotlin/io/element/android/libraries/push/impl/notifications/DefaultNotifiableEventResolverTest.kt

@@ -627,7 +627,7 @@ class DefaultNotifiableEventResolverTest {
                 senderId = A_USER_ID_2,
                 roomName = A_ROOM_NAME,
                 editedEventId = null,
-                description = "Incoming call",
+                description = "📹 Incoming call",
                 timestamp = timestamp,
                 canBeReplaced = true,
                 isRedacted = false,
@@ -663,7 +663,7 @@ class DefaultNotifiableEventResolverTest {
                 timestamp = 0L,
                 senderDisambiguatedDisplayName = A_USER_NAME_2,
                 senderId = A_USER_ID_2,
-                body = "☎\uFE0F Incoming call",
+                body = "📹 Incoming call",
                 roomId = A_ROOM_ID,
                 threadId = null,
                 roomName = A_ROOM_NAME,
@@ -699,7 +699,7 @@ class DefaultNotifiableEventResolverTest {
                 timestamp = A_TIMESTAMP,
                 senderDisambiguatedDisplayName = A_USER_NAME_2,
                 senderId = A_USER_ID_2,
-                body = "☎\uFE0F Incoming call",
+                body = "📹 Incoming call",
                 roomId = A_ROOM_ID,
                 threadId = null,
                 roomName = A_ROOM_NAME,