Log some actions for changing wifi hotspot config

Log following actions:
- wifi hotspot name changed
- wifi hotspot password changed

Added tests for logging actions in each controller's test.

Bug: 151113705
Test: WifiTetherSSIDPrefereceControllerTest;
WifiTetherPasswordPreferenceControllerTest;
CodeInspectionTest

Change-Id: I84b1cd8449e575a6ee1ad8868e7791dc601e726f

src/com/android/settings/wifi/tether/WifiTetherPasswordPreferenceController.java

@@ -18,18 +18,22 @@ package com.android.settings.wifi.tether;
 
 import static com.android.settings.AllInOneTetherSettings.DEDUP_POSTFIX;
 
+import android.app.settings.SettingsEnums;
 import android.content.Context;
 import android.net.wifi.SoftApConfiguration;
 import android.text.TextUtils;
 import android.util.FeatureFlagUtils;
 
+import androidx.annotation.VisibleForTesting;
 import androidx.preference.EditTextPreference;
 import androidx.preference.Preference;
 
 import com.android.settings.R;
 import com.android.settings.core.FeatureFlags;
+import com.android.settings.overlay.FeatureFactory;
 import com.android.settings.widget.ValidatedEditTextPreference;
 import com.android.settings.wifi.WifiUtils;
+import com.android.settingslib.core.instrumentation.MetricsFeatureProvider;
 
 import java.util.UUID;
 
@@ -40,9 +44,19 @@ public class WifiTetherPasswordPreferenceController extends WifiTetherBasePrefer
 
     private String mPassword;
 
+    private final MetricsFeatureProvider mMetricsFeatureProvider;
+
+    @VisibleForTesting
+    WifiTetherPasswordPreferenceController(Context context, OnTetherConfigUpdateListener listener,
+            MetricsFeatureProvider provider) {
+        super(context, listener);
+        mMetricsFeatureProvider = provider;
+    }
+
     public WifiTetherPasswordPreferenceController(Context context,
             OnTetherConfigUpdateListener listener) {
         super(context, listener);
+        mMetricsFeatureProvider = FeatureFactory.getFactory(context).getMetricsFeatureProvider();
     }
 
     @Override
@@ -69,6 +83,10 @@ public class WifiTetherPasswordPreferenceController extends WifiTetherBasePrefer
 
     @Override
     public boolean onPreferenceChange(Preference preference, Object newValue) {
+        if (!TextUtils.equals(mPassword, (String) newValue)) {
+            mMetricsFeatureProvider.action(mContext,
+                    SettingsEnums.ACTION_SETTINGS_CHANGE_WIFI_HOTSPOT_PASSWORD);
+        }
         mPassword = (String) newValue;
         updatePasswordDisplay((EditTextPreference) mPreference);
         mListener.onTetherConfigUpdated(this);

src/com/android/settings/wifi/tether/WifiTetherSSIDPreferenceController.java

@@ -22,6 +22,7 @@ import android.app.settings.SettingsEnums;
 import android.content.Context;
 import android.content.Intent;
 import android.net.wifi.SoftApConfiguration;
+import android.text.TextUtils;
 import android.util.FeatureFlagUtils;
 import android.util.Log;
 
@@ -48,6 +49,15 @@ public class WifiTetherSSIDPreferenceController extends WifiTetherBasePreference
 
     private final MetricsFeatureProvider mMetricsFeatureProvider;
 
+    // This constructor is used for testing.
+    @VisibleForTesting
+    WifiTetherSSIDPreferenceController(Context context, OnTetherConfigUpdateListener listener,
+            MetricsFeatureProvider provider) {
+        super(context, listener);
+        mWifiDeviceNameTextValidator = new WifiDeviceNameTextValidator();
+        mMetricsFeatureProvider = provider;
+    }
+
     public WifiTetherSSIDPreferenceController(Context context,
             OnTetherConfigUpdateListener listener) {
         super(context, listener);
@@ -93,6 +103,10 @@ public class WifiTetherSSIDPreferenceController extends WifiTetherBasePreference
 
     @Override
     public boolean onPreferenceChange(Preference preference, Object newValue) {
+        if (!TextUtils.equals(mSSID, (String) newValue)) {
+            mMetricsFeatureProvider.action(mContext,
+                    SettingsEnums.ACTION_SETTINGS_CHANGE_WIFI_HOTSPOT_NAME);
+        }
         mSSID = (String) newValue;
         updateSsidDisplay((EditTextPreference) preference);
         mListener.onTetherConfigUpdated(this);