Introduce accessibility large pointer icons.

This patch does the following things:
- add new graphic assets of large icons for accessibility needs
  (imported from ChromeOS data)
- add the logic to choose the set of normal icons or accessibility icons
- make InputManagerService to observe the settings change, so that
  it can reload the new resources

This patch misses non-1x graphic though, because ChromeOS doesn't
have such data.

Bug: 25778857
Change-Id: Ia5f95d47f50b3f6eea555c3af8069bc6bae0b400

libs/input/PointerController.cpp

@@ -91,7 +91,14 @@ PointerController::PointerController(const sp<PointerControllerPolicyInterface>&
 
     mLocked.buttonState = 0;
 
+    mPolicy->loadPointerIcon(&mLocked.pointerIcon);
+
     loadResources();
+
+    if (mLocked.pointerIcon.isValid()) {
+        mLocked.pointerIconChanged = true;
+        updatePointerLocked();
+    }
 }
 
 PointerController::~PointerController() {
@@ -325,6 +332,23 @@ void PointerController::setInactivityTimeout(InactivityTimeout inactivityTimeout
     }
 }
 
+void PointerController::reloadPointerResources() {
+    AutoMutex _l(mLock);
+
+    loadResources();
+
+    if (mLocked.presentation == PRESENTATION_POINTER) {
+        mLocked.additionalMouseResources.clear();
+        mLocked.animationResources.clear();
+        mPolicy->loadPointerIcon(&mLocked.pointerIcon);
+        mPolicy->loadAdditionalMouseResources(&mLocked.additionalMouseResources,
+                                              &mLocked.animationResources);
+    }
+
+    mLocked.presentationChanged = true;
+    updatePointerLocked();
+}
+
 void PointerController::setDisplayViewport(int32_t width, int32_t height, int32_t orientation) {
     AutoMutex _l(mLock);
 
@@ -415,15 +439,6 @@ void PointerController::updatePointerShape(int32_t iconId) {
     }
 }
 
-void PointerController::setPointerIcon(const SpriteIcon& icon) {
-    AutoMutex _l(mLock);
-
-    mLocked.pointerIcon = icon.copy();
-    mLocked.pointerIconChanged = true;
-
-    updatePointerLocked();
-}
-
 void PointerController::handleMessage(const Message& message) {
     switch (message.what) {
     case MSG_INACTIVITY_TIMEOUT: