fix(android): 修复气泡长按手势计时及取消处理逻辑

在 FloatingTriggerService 而非 MicBubbleView 中跟踪手势开始时间，以确保长按检测的准确性。此前，MicBubbleView 中的 downAt 时间戳可能会过期，导致 ACTION_UP 时协调器行为异常。同时增加了适当的 ACTION_CANCEL 处理，用于重置手势状态，防止过时的计时数据影响后续手势。

Author: HKLHaoBin

openless-android/src/com/openless/android/FloatingTriggerService.java

@@ -50,6 +50,8 @@ public final class FloatingTriggerService extends Service implements AndroidDict
     private final Handler main = new Handler(Looper.getMainLooper());
     private int stateGeneration;
     private boolean dragging;
+    /** 0 = no active bubble press; set on ACTION_DOWN, cleared on ACTION_UP/CANCEL. */
+    private long bubbleGestureDownAtMs;
     private float downX;
     private float downY;
     private int startX;
@@ -212,6 +214,7 @@ private boolean onBubbleTouch(View view, MotionEvent event) {
             case MotionEvent.ACTION_DOWN:
                 downX = event.getRawX(); downY = event.getRawY();
                 startX = params.x; startY = params.y; dragging = false;
+                bubbleGestureDownAtMs = System.currentTimeMillis();
                 return true;
             case MotionEvent.ACTION_MOVE:
                 float dx = event.getRawX() - downX;
@@ -225,10 +228,15 @@ private boolean onBubbleTouch(View view, MotionEvent event) {
                 return true;
             case MotionEvent.ACTION_UP:
                 if (!dragging) {
-                    if (System.currentTimeMillis() - bubble.downAt >= LONG_PRESS_CANCEL_MS) {
+                    if (System.currentTimeMillis() - bubbleGestureDownAtMs >= LONG_PRESS_CANCEL_MS) {
                         coordinator.cancel();
                     } else { coordinator.toggle(); }
                 }
+                bubbleGestureDownAtMs = 0;
+                return true;
+            case MotionEvent.ACTION_CANCEL:
+                bubbleGestureDownAtMs = 0;
+                dragging = false;
                 return true;
             default: return true;
         }
@@ -286,7 +294,6 @@ private static class MicBubbleView extends View {
         private String statusText;
         private boolean showDot = true;
         private boolean dotOn = true;
-        long downAt;
 
         MicBubbleView(android.content.Context context) {
             super(context);
@@ -378,12 +385,6 @@ private void drawMicIcon(Canvas canvas, float cx, float cy, float r) {
             }
         }
 
-        @Override
-        public boolean onTouchEvent(MotionEvent event) {
-            if (event.getAction() == MotionEvent.ACTION_DOWN) downAt = System.currentTimeMillis();
-            return super.onTouchEvent(event);
-        }
-
         private int dp(int value) { return (int) (value * getResources().getDisplayMetrics().density + 0.5f); }
     }
 }