Don't throw unsupported exception over binder call

Otherwise, Parcel will fail to read the arguments and the exception
won't be sent to the caller.

Bug: 179771384
Bug: 184037368
Test: atest DisplayPolicyTests
Change-Id: I820067f409e9b061d338967f036445b7dc10a59c

services/core/java/com/android/server/wm/DisplayPolicy.java

@@ -905,8 +905,8 @@ public class DisplayPolicy {
                         && win.mActivityRecord.fillsParent()
                         && (win.mAttrs.privateFlags & PRIVATE_FLAG_FORCE_DRAW_BAR_BACKGROUNDS) != 0
                         && attrs.getFitInsetsTypes() != 0) {
-                    throw new RuntimeException("Illegal attributes: Main activity window that isn't"
-                            + " translucent trying to fit insets: "
+                    throw new IllegalArgumentException("Illegal attributes: Main activity window"
+                            + " that isn't translucent trying to fit insets: "
                             + attrs.getFitInsetsTypes()
                             + " attrs=" + attrs);
                 }

services/tests/wmtests/src/com/android/server/wm/DisplayPolicyTests.java

@@ -227,7 +227,7 @@ public class DisplayPolicyTests extends WindowTestsBase {
         assertEquals(mAppWindow, policy.getTopFullscreenOpaqueWindow());
     }
 
-    @Test(expected = RuntimeException.class)
+    @Test(expected = IllegalArgumentException.class)
     public void testMainAppWindowDisallowFitSystemWindowTypes() {
         final DisplayPolicy policy = mDisplayContent.getDisplayPolicy();
         final WindowState activity = createBaseApplicationWindow();