Moved _is_on_message_waiting_event_true to tel_voice_utils

Since the only function call_reject_leave_message_for_subscription
which calls _is_on_message_waiting_event_true was moved to tel_voice_utils,
_is_on_message_waiting_event_true should also be moved to tel_voice_utils.

Bug: None
Test: Yes, locally
Change-Id: Ie6a7169760ae963e9ff5dbac6eb4f45535a5954e
diff --git a/acts_tests/acts_contrib/test_utils/tel/tel_test_utils.py b/acts_tests/acts_contrib/test_utils/tel/tel_test_utils.py
index 41d64cd..24152da 100644
--- a/acts_tests/acts_contrib/test_utils/tel/tel_test_utils.py
+++ b/acts_tests/acts_contrib/test_utils/tel/tel_test_utils.py
@@ -102,7 +102,6 @@
 from acts_contrib.test_utils.tel.tel_defines import EventDataConnectionStateChanged
 from acts_contrib.test_utils.tel.tel_defines import EventServiceStateChanged
 from acts_contrib.test_utils.tel.tel_defines import DataConnectionStateContainer
-from acts_contrib.test_utils.tel.tel_defines import MessageWaitingIndicatorContainer
 from acts_contrib.test_utils.tel.tel_defines import NetworkCallbackContainer
 from acts_contrib.test_utils.tel.tel_defines import ServiceStateContainer
 from acts_contrib.test_utils.tel.tel_defines import DisplayInfoContainer
@@ -1281,13 +1280,6 @@
         return False
 
 
-def _is_on_message_waiting_event_true(event):
-    """Private function to return if the received EventMessageWaitingIndicatorChanged
-    event MessageWaitingIndicatorContainer.IS_MESSAGE_WAITING field is True.
-    """
-    return event['data'][MessageWaitingIndicatorContainer.IS_MESSAGE_WAITING]
-
-
 def phone_number_formatter(input_string, formatter=None):
     """Get expected format of input phone number string.
 
diff --git a/acts_tests/acts_contrib/test_utils/tel/tel_voice_utils.py b/acts_tests/acts_contrib/test_utils/tel/tel_voice_utils.py
index 435873a..68b4f63 100644
--- a/acts_tests/acts_contrib/test_utils/tel/tel_voice_utils.py
+++ b/acts_tests/acts_contrib/test_utils/tel/tel_voice_utils.py
@@ -63,6 +63,7 @@
 from acts_contrib.test_utils.tel.tel_defines import EventCallStateChanged
 from acts_contrib.test_utils.tel.tel_defines import EventMessageWaitingIndicatorChanged
 from acts_contrib.test_utils.tel.tel_defines import CallStateContainer
+from acts_contrib.test_utils.tel.tel_defines import MessageWaitingIndicatorContainer
 from acts_contrib.test_utils.tel.tel_5g_utils import is_current_network_5g
 from acts_contrib.test_utils.tel.tel_ims_utils import is_wfc_enabled
 from acts_contrib.test_utils.tel.tel_ims_utils import toggle_volte
@@ -80,7 +81,6 @@
 from acts_contrib.test_utils.tel.tel_subscription_utils import get_outgoing_voice_sub_id
 from acts_contrib.test_utils.tel.tel_subscription_utils import set_subid_for_outgoing_call
 from acts_contrib.test_utils.tel.tel_subscription_utils import get_subid_from_slot_index
-from acts_contrib.test_utils.tel.tel_test_utils import _is_on_message_waiting_event_true
 from acts_contrib.test_utils.tel.tel_test_utils import _wait_for_droid_in_state
 from acts_contrib.test_utils.tel.tel_test_utils import check_call_state_connected_by_adb
 from acts_contrib.test_utils.tel.tel_test_utils import check_call_state_idle_by_adb
@@ -531,6 +531,13 @@
     return operator_name not in operators_no_reject
 
 
+def _is_on_message_waiting_event_true(event):
+    """Private function to return if the received EventMessageWaitingIndicatorChanged
+    event MessageWaitingIndicatorContainer.IS_MESSAGE_WAITING field is True.
+    """
+    return event['data'][MessageWaitingIndicatorContainer.IS_MESSAGE_WAITING]
+
+
 def call_reject_leave_message_for_subscription(
         log,
         ad_caller,