Add progressive disclsoure

- Add a ProgressiveDisclosureMixin that contains all logic for collapse
  preference list when it's too long
- Refactored PreferenceController's updateState to take a preference
  instead of PreferenceScreen, because with progressive disclosure the
  preference can either be in screen or the mixin. DashboardFragment is
  responsible finding the preference before passing it to controller.

Bug: 32255863
Test: RunSettingsRoboTests

Change-Id: I6713abd61c954ce12732902e5b3ca4d4c0b1563e

src/com/android/settings/network/AirplaneModePreferenceController.java

@@ -92,7 +92,7 @@ public class AirplaneModePreferenceController extends PreferenceController
     }
 
     @Override
-    protected String getPreferenceKey() {
+    public String getPreferenceKey() {
         return KEY_TOGGLE_AIRPLANE;
     }
 

src/com/android/settings/network/MobileNetworkPreferenceController.java

@@ -52,7 +52,7 @@ public class MobileNetworkPreferenceController extends PreferenceController {
     }
 
     @Override
-    protected String getPreferenceKey() {
+    public String getPreferenceKey() {
         return KEY_MOBILE_NETWORK_SETTINGS;
     }
 }

src/com/android/settings/network/MobilePlanPreferenceController.java

@@ -120,7 +120,7 @@ public class MobilePlanPreferenceController extends PreferenceController impleme
         return isPrefAllowedForUser && isPrefAllowedOnDevice;
     }
     @Override
-    protected String getPreferenceKey() {
+    public String getPreferenceKey() {
         return KEY_MANAGE_MOBILE_PLAN;
     }
 

src/com/android/settings/network/NetworkResetPreferenceController.java

@@ -43,7 +43,7 @@ public class NetworkResetPreferenceController extends PreferenceController {
     }
 
     @Override
-    protected String getPreferenceKey() {
+    public String getPreferenceKey() {
         return KEY_NETWORK_RESET;
     }
 }

src/com/android/settings/network/ProxyPreferenceController.java

@@ -54,7 +54,7 @@ public class ProxyPreferenceController extends PreferenceController {
     }
 
     @Override
-    protected String getPreferenceKey() {
+    public String getPreferenceKey() {
         return KEY_PROXY_SETTINGS;
     }
 }

src/com/android/settings/network/TetherPreferenceController.java

@@ -83,7 +83,7 @@ public class TetherPreferenceController extends PreferenceController {
     }
 
     @Override
-    protected String getPreferenceKey() {
+    public String getPreferenceKey() {
         return KEY_TETHER_SETTINGS;
     }
 }

src/com/android/settings/network/VpnPreferenceController.java

@@ -65,7 +65,7 @@ public class VpnPreferenceController extends PreferenceController {
     }
 
     @Override
-    protected String getPreferenceKey() {
+    public String getPreferenceKey() {
         return KEY_VPN_SETTINGS;
     }
 }

src/com/android/settings/network/WifiCallingPreferenceController.java

@@ -56,7 +56,7 @@ public class WifiCallingPreferenceController extends PreferenceController {
     }
 
     @Override
-    protected String getPreferenceKey() {
+    public String getPreferenceKey() {
         return KEY_WFC_SETTINGS;
     }
 }