Only AssumeNotNull instructions throw on null input

Bug: 192020214
Change-Id: Ia19d36131547ed9f3d6d4e48f845f0f4957ccf11

src/main/java/com/android/tools/r8/ir/code/Assume.java

diff --git a/src/main/java/com/android/tools/r8/ir/code/Assume.java b/src/main/java/com/android/tools/r8/ir/code/Assume.java
index 9c70c92..3a51eec 100644
--- a/src/main/java/com/android/tools/r8/ir/code/Assume.java
+++ b/src/main/java/com/android/tools/r8/ir/code/Assume.java
@@ -246,7 +246,7 @@
 
   @Override
   public boolean throwsOnNullInput() {
-    return true;
+    return hasNonNullAssumption();
   }
 
   @Override