Make InputWindowInfo as a part of InputWindowHandle (1/2)

All over InputDispatcher, we are accessing InputWindowInfo
from InputWindowHandle through the api getInfo().
It's dangerous without checking the result is null.

- To replace allocated mInfo in updateInfo(), make it as an object
  member variable of InputWindowHandle.
- Change releaseInfo to releaseChannel to release input channel immediately.
- Add displayId information for logs so we can find out the problems
  should belong to which display.

Bug: 112616659
Test: atest inputflinger_tests
Test: Manually enable debug logs
Change-Id: I5770f296e3feab4919fe775bab20ef6346f05295
diff --git a/libs/input/InputWindow.cpp b/libs/input/InputWindow.cpp
index f94faba..6968661 100644
--- a/libs/input/InputWindow.cpp
+++ b/libs/input/InputWindow.cpp
@@ -138,22 +138,18 @@
 // --- InputWindowHandle ---
 
 InputWindowHandle::InputWindowHandle(const sp<InputApplicationHandle>& inputApplicationHandle) :
-    inputApplicationHandle(inputApplicationHandle), mInfo(nullptr) {
+    inputApplicationHandle(inputApplicationHandle) {
 }
 
 InputWindowHandle::~InputWindowHandle() {
-    delete mInfo;
 }
 
-void InputWindowHandle::releaseInfo() {
-    if (mInfo) {
-        delete mInfo;
-        mInfo = nullptr;
-    }
+void InputWindowHandle::releaseChannel() {
+    mInfo.inputChannel.clear();
 }
 
 sp<InputChannel> InputWindowHandle::getInputChannel() const {
-    return mInfo ? mInfo->inputChannel : nullptr;
+    return mInfo.inputChannel;
 }
 
 } // namespace android