Change StatusBar default style handling strategy

Summary:
Changelog: [Android] - Change StatusBar style handling strategy

Previously Android status bar can set to `dark-content` or `default`, I made the following changes:

- Added `light-content` to get align with iOS
- Changed the behavior of `default` from setting status bar with 'SYSTEM_UI_FLAG_LIGHT_STATUS_BAR' to not doing anything, I did this because 1, `setStyle('default')` is found called even without explicitly declared <StatusBar> on that surface, which I think should fail silently 2, my idea is that user should set status bar style to `dark-content` or `light-content` explicitly instead of using `default`.
- Fixed the bug found in Dating Settings's Second Look.

Reviewed By: RSNara

Differential Revision: D24714152

fbshipit-source-id: 76e7d0d45fd3b8c3733efaee81426f5f449cc7d8

Libraries/Components/StatusBar/NativeStatusBarManagerAndroid.js

@@ -55,6 +55,7 @@ const NativeStatusBarManager = {
   /**
    *  - statusBarStyles can be:
    *    - 'default'
+   *    - 'light-content'
    *    - 'dark-content'
    */
   setStyle(statusBarStyle?: ?string): void {

Libraries/Components/StatusBar/StatusBar.js

@@ -25,7 +25,7 @@ import NativeStatusBarManagerIOS from './NativeStatusBarManagerIOS';
  */
 export type StatusBarStyle = $Keys<{
   /**
-   * Default status bar style (dark for iOS, light for Android)
+   * Default status bar style (dark for iOS, no change for Android)
    */
   default: string,
   /**

ReactAndroid/src/main/java/com/facebook/react/modules/statusbar/StatusBarModule.java

@@ -194,7 +194,7 @@ public void run() {
               int systemUiVisibilityFlags = decorView.getSystemUiVisibility();
               if ("dark-content".equals(style)) {
                 systemUiVisibilityFlags |= View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;
-              } else {
+              } else if ("light-content".equals(style)) {
                 systemUiVisibilityFlags &= ~View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;
               }
               decorView.setSystemUiVisibility(systemUiVisibilityFlags);