Fix multi selection for clipped overflown text

This change adds a condition to selection handles positioning so that handles are not removed from composition while being dragged.

Fix: b/264832060
Test: SelectionContainerTest
Test: ./gradlew :compose:foundation:foundation:cAT
Change-Id: I51c09944fff0a529630ed9ea81c1f90e6c1deec4

diff --git a/compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/text/selection/SelectionManager.kt b/compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/text/selection/SelectionManager.kt
index 87053fb..e249b73 100644
--- a/compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/text/selection/SelectionManager.kt
+++ b/compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/text/selection/SelectionManager.kt

@@ -334,10 +334,19 @@
         )
 
         val visibleBounds = containerCoordinates.visibleBounds()
-        this.startHandlePosition =
-            if (visibleBounds.containsInclusive(startHandlePosition)) startHandlePosition else null
-        this.endHandlePosition =
-            if (visibleBounds.containsInclusive(endHandlePosition)) endHandlePosition else null
+
+        // set the new handle position only if the handle is in visible bounds or
+        // the handle is still dragging. If handle goes out of visible bounds during drag, handle
+        // popup is also removed from composition, halting the drag gesture. This affects multiple
+        // text selection when selected text is configured with maxLines=1 and overflow=clip.
+        this.startHandlePosition = startHandlePosition.takeIf {
+            visibleBounds.containsInclusive(startHandlePosition) ||
+                draggingHandle == Handle.SelectionStart
+        }
+        this.endHandlePosition = endHandlePosition.takeIf {
+            visibleBounds.containsInclusive(endHandlePosition) ||
+                draggingHandle == Handle.SelectionEnd
+        }
     }
 
     /**