Avoid crash when widget previews have no intrinsic size

Intrinsic size for widget preview drawable checked.
Needed since some drawables, like color drawables,
do not have any intrinsic size.

Bug: 78452220
Test: manual, see Bug info.
Change-Id: I815353773e38b1fce2fe19962f07c1727e1b0768
diff --git a/src/com/android/launcher3/WidgetPreviewLoader.java b/src/com/android/launcher3/WidgetPreviewLoader.java
index a658d58..7af4bf9 100644
--- a/src/com/android/launcher3/WidgetPreviewLoader.java
+++ b/src/com/android/launcher3/WidgetPreviewLoader.java
@@ -338,7 +338,8 @@
         int previewWidth;
         int previewHeight;
 
-        if (widgetPreviewExists) {
+        if (widgetPreviewExists && drawable.getIntrinsicWidth() > 0
+                && drawable.getIntrinsicHeight() > 0) {
             previewWidth = drawable.getIntrinsicWidth();
             previewHeight = drawable.getIntrinsicHeight();
         } else {
@@ -358,8 +359,8 @@
             scale = maxPreviewWidth / (float) (previewWidth);
         }
         if (scale != 1f) {
-            previewWidth = (int) (scale * previewWidth);
-            previewHeight = (int) (scale * previewHeight);
+            previewWidth = Math.max((int)(scale * previewWidth), 1);
+            previewHeight = Math.max((int)(scale * previewHeight), 1);
         }
 
         // If a bitmap is passed in, we use it; otherwise, we create a bitmap of the right size