Add null check before access attribute set.

PiperOrigin-RevId: 203830200

Author: wcshi

lib/java/com/google/android/material/chip/ChipDrawable.java

@@ -377,7 +377,7 @@ private void loadFromAttributes(
     setChipIconVisible(a.getBoolean(R.styleable.Chip_chipIconVisible, false));
     // If the user explicitly sets the deprecated attribute (chipIconEnabled) but NOT the
     // replacement attribute (chipIconVisible), use the value specified in the deprecated attribute.
-    if (attrs.getAttributeValue(NAMESPACE_APP, "chipIconEnabled") != null
+    if (attrs != null && attrs.getAttributeValue(NAMESPACE_APP, "chipIconEnabled") != null
         && attrs.getAttributeValue(NAMESPACE_APP, "chipIconVisible") == null) {
       setChipIconVisible(a.getBoolean(R.styleable.Chip_chipIconEnabled, false));
     }
@@ -389,7 +389,7 @@ private void loadFromAttributes(
     // If the user explicitly sets the deprecated attribute (closeIconEnabled) but NOT the
     // replacement attribute (closeIconVisible), use the value specified in the deprecated
     // attribute.
-    if (attrs.getAttributeValue(NAMESPACE_APP, "closeIconEnabled") != null
+    if (attrs != null && attrs.getAttributeValue(NAMESPACE_APP, "closeIconEnabled") != null
         && attrs.getAttributeValue(NAMESPACE_APP, "closeIconVisible") == null) {
       setCloseIconVisible(a.getBoolean(R.styleable.Chip_closeIconEnabled, false));
     }
@@ -403,7 +403,7 @@ private void loadFromAttributes(
     // If the user explicitly sets the deprecated attribute (checkedIconEnabled) but NOT the
     // replacement attribute (checkedIconVisible), use the value specified in the deprecated
     // attribute.
-    if (attrs.getAttributeValue(NAMESPACE_APP, "checkedIconEnabled") != null
+    if (attrs != null && attrs.getAttributeValue(NAMESPACE_APP, "checkedIconEnabled") != null
         && attrs.getAttributeValue(NAMESPACE_APP, "checkedIconVisible") == null) {
       setCheckedIconVisible(a.getBoolean(R.styleable.Chip_checkedIconEnabled, false));
     }