App header cleanup

- Refactor the entity header layout to use LinearLayout and add id to
  content area
- Remove now unused AppHeader class
- Make entire icon+text area clickable and link to app info page
  Refactor the binding logic from bindButton to its own method.
- Remove unused MultiLinePreference

Fix: 62705377
Test: make RunSettingsRoboTests

Change-Id: I6db554695410e71b669f6fdba29d98fedc3364b9

src/com/android/settings/applications/AppInfoWithHeader.java

@@ -51,7 +51,8 @@ public abstract class AppInfoWithHeader extends AppInfoBase {
                 .setIsInstantApp(AppUtils.isInstant(mPackageInfo.applicationInfo))
                 .setPackageName(mPackageName)
                 .setUid(mPackageInfo.applicationInfo.uid)
-                .setButtonActions(ActionType.ACTION_APP_INFO, ActionType.ACTION_NONE)
+                .setHasAppInfoLink(true)
+                .setButtonActions(ActionType.ACTION_NONE, ActionType.ACTION_NONE)
                 .done(activity, getPrefContext());
         getPreferenceScreen().addPreference(pref);
     }