Updating math to Harmony r772995.

Notable changes:
- lots of trailing whitespace and "@since Android 1.0" tags removed
- shiftLeft(1) replaced with shiftLeftOneBit(). That case can be optimized
  more aggressively than the general case. The new method exists in BigInteger
  and calls through to a new method in BitLevel in the same way as Harmony.

This is a squashed commit of the following:

commit 3f071487bdb8fff0b4a71ce0219ee7e1e16369fb
Merge: 4fda354 10640b6
Author: Jesse Wilson <jessewilson@google.com>
Date:   Tue Aug 4 12:02:25 2009 -0700

    Merge branch 'math_772995' into math_dalvik

    Conflicts:
    	libcore/math/.classpath
    	libcore/math/build.xml
    	libcore/math/src/main/java/java/math/BigDecimal.java
    	libcore/math/src/main/java/java/math/BigInteger.java
    	libcore/math/src/main/java/java/math/Division.java
    	libcore/math/src/main/java/java/math/Elementary.java
    	libcore/math/src/main/java/java/math/Logical.java
    	libcore/math/src/main/java/java/math/MathContext.java
    	libcore/math/src/main/java/java/math/Multiplication.java
    	libcore/math/src/main/java/java/math/Primality.java
    	libcore/math/src/main/java/java/math/RoundingMode.java
    	libcore/math/src/test/java/tests/api/java/math/BigDecimalTest.java
    	libcore/math/src/test/java/tests/api/java/math/BigIntegerTest.java

commit 4fda354bd7d2c0ee918c86fa89852310cc8f2af7
Author: Jesse Wilson <jessewilson@google.com>
Date:   Wed Jul 29 17:12:27 2009 -0700

    Dalvik Math

commit 10640b6b254200f1c89553072e50137f6ad46c84
Author: Jesse Wilson <jessewilson@google.com>
Date:   Wed Jul 29 17:11:07 2009 -0700

    Math 772995

commit 15302f6d09b3547f1018e3d228f233f8f72c7de9
Author: Jesse Wilson <jessewilson@google.com>
Date:   Wed Jul 29 17:08:19 2009 -0700

    Math 527399

2 files changed, 47 insertions, 1 deletions

diff --git a/math/src/test/java/tests/api/java/math/BigDecimalTest.java b/math/src/test/java/tests/api/java/math/BigDecimalTest.java
index 47e5b31..572f2c1 100644
--- a/math/src/test/java/tests/api/java/math/BigDecimalTest.java
+++ b/math/src/test/java/tests/api/java/math/BigDecimalTest.java
@@ -30,6 +30,7 @@ import java.io.ObjectOutputStream;
 import java.math.BigDecimal;
 import java.math.BigInteger;
 import java.math.RoundingMode;
+import java.math.MathContext;
 
 @TestTargetClass(BigDecimal.class)
 public class BigDecimalTest extends junit.framework.TestCase {
@@ -1310,6 +1311,41 @@ public class BigDecimalTest extends junit.framework.TestCase {
         BigDecimal zerotest = new BigDecimal("0.0000");
         assertEquals("stripTrailingZero failed for 0.0000",
                 0, (zerotest.stripTrailingZeros()).scale() );        
-    }    
+    }
 
+    @TestTargetNew(
+            level = TestLevel.PARTIAL_COMPLETE,
+            notes = "",
+            method = "abs",
+            args = {MathContext.class}
+    )
+    public void testMathContextConstruction() {
+        String a = "-12380945E+61";
+        BigDecimal aNumber = new BigDecimal(a);
+        int precision = 6;
+        RoundingMode rm = RoundingMode.HALF_DOWN;
+        MathContext mcIntRm = new MathContext(precision, rm);
+        MathContext mcStr = new MathContext("precision=6 roundingMode=HALF_DOWN");
+        MathContext mcInt = new MathContext(precision);
+        BigDecimal res = aNumber.abs(mcInt);
+        assertEquals("MathContext Constructor with int precision failed",
+                res,
+                new BigDecimal("1.23809E+68"));
+
+        assertEquals("Equal MathContexts are not Equal ",
+                mcIntRm,
+                mcStr);
+
+        assertEquals("Different MathContext are reported as Equal ",
+                mcInt.equals(mcStr),
+                false);
+
+        assertEquals("Equal MathContexts have different hashcodes ",
+                mcIntRm.hashCode(),
+                mcStr.hashCode());
+
+        assertEquals("MathContext.toString() returning incorrect value",
+                mcIntRm.toString(),
+                "precision=6 roundingMode=HALF_DOWN");
+    }
 }
diff --git a/math/src/test/java/tests/api/java/math/BigIntegerTest.java b/math/src/test/java/tests/api/java/math/BigIntegerTest.java
index c640638..d04f742 100644
--- a/math/src/test/java/tests/api/java/math/BigIntegerTest.java
+++ b/math/src/test/java/tests/api/java/math/BigIntegerTest.java
@@ -1266,6 +1266,16 @@ public class BigIntegerTest extends junit.framework.TestCase {
                         (i1.testBit(i) && !i2.testBit(i)) == res.testBit(i));
             }
         }
+
+        //regression for HARMONY-4653
+        try{
+            BigInteger.ZERO.andNot(null);
+            fail("should throw NPE");
+        }catch(Exception e){
+            //expected
+        }
+        BigInteger bi = new BigInteger(0, new byte[]{});
+        assertEquals(BigInteger.ZERO, bi.andNot(BigInteger.ZERO));
     }