Make photos/videos storage preference normal.

We had special behavior for it in the past, but this defines new
behavior that is much closer to what the other storage preferences do.
A photo app filter is used and a photos/video files preference exists on
it which intents over to the gallery app.

Fixes: 64147318
Test: Settings robotests

Change-Id: I47284515fe2dfcc924ae61a44bc47051e9f5fda6
diff --git a/src/com/android/settings/Settings.java b/src/com/android/settings/Settings.java
index a696172..ee041e8 100644
--- a/src/com/android/settings/Settings.java
+++ b/src/com/android/settings/Settings.java
@@ -21,7 +21,6 @@
 import com.android.settings.applications.AppOpsSummary;
 import com.android.settings.enterprise.EnterprisePrivacySettings;
 import com.android.settings.fingerprint.FingerprintEnrollIntroduction;
-import com.android.settings.fingerprint.FingerprintSettings;
 import com.android.settings.password.ChooseLockGeneric;
 
 /**
@@ -128,6 +127,9 @@
     public static class AutomaticStorageManagerSettingsActivity extends SettingsActivity { /* empty */ }
     public static class GamesStorageActivity extends SettingsActivity { /* empty */ }
     public static class MoviesStorageActivity extends SettingsActivity { /* empty */ }
+    public static class PhotosStorageActivity extends SettingsActivity {
+        /* empty */
+    }
 
     public static class TopLevelSettings extends SettingsActivity { /* empty */ }
     public static class ApnSettingsActivity extends SettingsActivity { /* empty */ }