MOBILE-4470 behat: Fix Chat and Survey tests

They have been disabled in new Moodle instances in MDL-80866

src/addons/mod/chat/tests/behat/basic_usage.feature

@@ -15,6 +15,7 @@ Feature: Test basic usage of chat in app
       | user     | course | role           |
       | student1 | C1     | student        |
       | student2 | C1     | student        |
+    And I enable "chat" "mod" plugin
     And the following "activities" exist:
       | activity   | name            | intro       | course | idnumber | groupmode |
       | chat       | Test chat name  | Test chat   | C1     | chat     | 0         |

src/addons/mod/chat/tests/behat/navigation.feature

@@ -13,6 +13,7 @@ Feature: Test chat navigation
       | user     | course | role     |
       | student1 | C1     | student  |
       | student2 | C1     | student  |
+    And I enable "chat" "mod" plugin
     And the following "activities" exist:
       | activity   | name            | intro       | course | idnumber | groupmode |
       | chat       | Test chat name  | Test chat   | C1     | chat     | 0         |

src/addons/mod/survey/tests/behat/basic_usage.feature

@@ -16,6 +16,7 @@ Feature: Test basic usage of survey activity in app
       | user     | course | role    |
       | student1 | C1     | student |
       | teacher1 | C1     | editingteacher |
+    And I enable "survey" "mod" plugin
     And the following "activities" exist:
       | activity | name             | intro       | course | idnumber | groupmode |
       | survey   | Test survey name | Test survey | C1     | survey   | 0         |

src/core/features/course/tests/behat/basic_usage.feature

@@ -17,6 +17,8 @@ Feature: Test basic usage of one course in app
       | user | course | role |
       | teacher1 | C1 | editingteacher |
       | student1 | C1 | student |
+    And I enable "chat" "mod" plugin
+    And I enable "survey" "mod" plugin
     And the following "activities" exist:
       | activity | name            | intro                   | course | idnumber | option                       | section |
       | choice   | Choice course 1 | Test choice description | C1     | choice1  | Option 1, Option 2, Option 3 | 1       |
@@ -345,7 +347,7 @@ Feature: Test basic usage of one course in app
   Scenario: Navigation between sections using the bottom arrows
     When I entered the course "Course 1" as "student1" in the app
     Then the header should be "Course 1" in the app
-   And I should find "Test forum name" in the app
+    And I should find "Test forum name" in the app
     And I should find "Test wiki name" in the app
     And I should find "Choice course 1" in the app
     And I should find "assignment" in the app