Add java.math classes into EXPECTED_UPSTREAM

The libcore-compare-upstreams tool is used to guess the version of each
file by comparing the diff.

Bug: 111603149
Test: ojluni_refresh_files
Change-Id: Ia3f8ae4401c8b087c9ed6bbc2fc83d8afbd77cc6
diff --git a/EXPECTED_UPSTREAM b/EXPECTED_UPSTREAM
index 9ea644c..a531489 100644
--- a/EXPECTED_UPSTREAM
+++ b/EXPECTED_UPSTREAM
@@ -278,3 +278,11 @@
 ojluni/src/main/java/java/lang/reflect/WeakCache.java,jdk8u/jdk8u121-b13,jdk/src/share/classes/java/lang/reflect/WeakCache.java
 ojluni/src/main/java/java/lang/reflect/WildcardType.java,jdk11u/jdk-11+28,src/java.base/share/classes/java/lang/reflect/WildcardType.java
 ojluni/src/main/java/java/lang/reflect/package-info.java,jdk8u/jdk8u121-b13,jdk/src/share/classes/java/lang/reflect/package-info.java
+ojluni/src/main/java/java/math/BigDecimal.java,jdk8u/jdk8u252-ga,jdk/src/share/classes/java/math/BigDecimal.java
+ojluni/src/main/java/java/math/BigInteger.java,jdk8u/jdk8u252-ga,jdk/src/share/classes/java/math/BigInteger.java
+ojluni/src/main/java/java/math/BitSieve.java,jdk11u/jdk-11+28,src/java.base/share/classes/java/math/BitSieve.java
+ojluni/src/main/java/java/math/MathContext.java,jdk11u/jdk-11+28,src/java.base/share/classes/java/math/MathContext.java
+ojluni/src/main/java/java/math/MutableBigInteger.java,jdk11u/jdk-11+28,src/java.base/share/classes/java/math/MutableBigInteger.java
+ojluni/src/main/java/java/math/RoundingMode.java,jdk11u/jdk-11+28,src/java.base/share/classes/java/math/RoundingMode.java
+ojluni/src/main/java/java/math/SignedMutableBigInteger.java,jdk11u/jdk-11+28,src/java.base/share/classes/java/math/SignedMutableBigInteger.java
+ojluni/src/main/java/java/math/package-info.java,jdk11u/jdk-11+28,src/java.base/share/classes/java/math/package-info.java