Update language to comply with Android's inclusive language guidance

See https://source.android.com/setup/contribute/respectful-code for reference

Bug: 161896447
Test: robotest & manual
Change-Id: I36829e0055437dab79d9e5339ac002a87a4b874f

src/com/android/settings/applications/appops/AppOpsState.java

@@ -588,7 +588,7 @@ public class AppOpsState {
             if (appEntry == null) {
                 continue;
             }
-            List<AppOpsManager.OpEntry> dummyOps = null;
+            List<AppOpsManager.OpEntry> stubOps = null;
             AppOpsManager.PackageOps pkgOps = null;
             if (appInfo.requestedPermissions != null) {
                 for (int j=0; j<appInfo.requestedPermissions.length; j++) {
@@ -611,15 +611,15 @@ public class AppOpsState {
                         if (appEntry.hasOp(permOps.get(k))) {
                             continue;
                         }
-                        if (dummyOps == null) {
-                            dummyOps = new ArrayList<AppOpsManager.OpEntry>();
+                        if (stubOps == null) {
+                            stubOps = new ArrayList<AppOpsManager.OpEntry>();
                             pkgOps = new AppOpsManager.PackageOps(
-                                    appInfo.packageName, appInfo.applicationInfo.uid, dummyOps);
+                                    appInfo.packageName, appInfo.applicationInfo.uid, stubOps);
 
                         }
                         AppOpsManager.OpEntry opEntry = new AppOpsManager.OpEntry(
                                 permOps.get(k), AppOpsManager.MODE_ALLOWED, Collections.emptyMap());
-                        dummyOps.add(opEntry);
+                        stubOps.add(opEntry);
                         addOp(entries, pkgOps, appEntry, opEntry, packageName == null,
                                 packageName == null ? 0 : opToOrder[opEntry.getOp()]);
                     }

src/com/android/settings/backup/SettingsBackupHelper.java

@@ -59,7 +59,7 @@ public class SettingsBackupHelper extends BackupAgentHelper {
 
             try (FileOutputStream out = new FileOutputStream(newState.getFileDescriptor())) {
                 if (getVersionCode(oldState) != VERSION_CODE) {
-                    data.writeEntityHeader("dummy", 1);
+                    data.writeEntityHeader("placeholder", 1);
                     data.writeEntityData(new byte[1], 1);
                 }
 

src/com/android/settings/dashboard/profileselector/ProfileSelectFragment.java

@@ -142,7 +142,7 @@ public abstract class ProfileSelectFragment extends DashboardFragment {
 
     @Override
     protected int getPreferenceScreenResId() {
-        return R.xml.dummy_preference_screen;
+        return R.xml.placeholder_preference_screen;
     }
 
     @Override

src/com/android/settings/deviceinfo/aboutphone/TopLevelAboutDevicePreferenceController.java

@@ -35,7 +35,7 @@ public class TopLevelAboutDevicePreferenceController extends BasePreferenceContr
     @Override
     public CharSequence getSummary() {
         final DeviceNamePreferenceController deviceNamePreferenceController =
-                new DeviceNamePreferenceController(mContext, "dummy_key");
+                new DeviceNamePreferenceController(mContext, "unused_key");
         return deviceNamePreferenceController.getSummary();
     }
 }

src/com/android/settings/display/TopLevelDisplayPreferenceController.java

@@ -37,7 +37,7 @@ public class TopLevelDisplayPreferenceController extends BasePreferenceControlle
     @Override
     public CharSequence getSummary() {
         final WallpaperPreferenceController controller =
-                new WallpaperPreferenceController(mContext, "dummy_key");
+                new WallpaperPreferenceController(mContext, "unused_key");
         if (controller.isAvailable()) {
             return mContext.getText(
                     controller.areStylesAvailable()

src/com/android/settings/fuelgauge/InactiveApps.java

@@ -77,7 +77,7 @@ public class InactiveApps extends SettingsPreferenceFragment
         super.onCreate(icicle);
 
         mUsageStats = getActivity().getSystemService(UsageStatsManager.class);
-        addPreferencesFromResource(R.xml.dummy_preference_screen);
+        addPreferencesFromResource(R.xml.placeholder_preference_screen);
         getActivity().setTitle(R.string.inactive_apps_title);
     }
 

src/com/android/settings/wallpaper/StyleSuggestionActivityBase.java

@@ -38,7 +38,7 @@ public abstract class StyleSuggestionActivityBase extends Activity {
         super.onCreate(savedInstanceState);
         final PackageManager pm = getPackageManager();
         final Intent intent = new Intent()
-                .setComponent(new WallpaperPreferenceController(this, "dummy key")
+                .setComponent(new WallpaperPreferenceController(this, "unused key")
                         .getComponentName())
                 .addFlags(Intent.FLAG_ACTIVITY_FORWARD_RESULT);
 

src/com/android/settings/wallpaper/WallpaperSuggestionActivity.java

@@ -69,7 +69,7 @@ public class WallpaperSuggestionActivity extends StyleSuggestionActivityBase imp
                         boolean enabled) {
                     final List<SearchIndexableRaw> result = new ArrayList<>();
                     WallpaperPreferenceController controller =
-                            new WallpaperPreferenceController(context, "dummy key");
+                            new WallpaperPreferenceController(context, "unused key");
                     SearchIndexableRaw data = new SearchIndexableRaw(context);
                     data.title = controller.getTitle();
                     data.screenTitle = data.title;