[errorprone] Suppress UnnecessaryParentheses

for the sake of readability.

See https://errorprone.info/bugpattern/UnnecessaryParentheses

Change-Id: I8444db78c408d4e8bd71bf7e575b9af637900629

org.eclipse.jgit/src/org/eclipse/jgit/util/Base64.java

@@ -96,6 +96,7 @@ private Base64() {
 	 * @param destOffset
 	 *            the index where output will be put
 	 */
+	@SuppressWarnings("UnnecessaryParentheses")
 	private static void encode3to4(byte[] source, int srcOffset,
 			int numSigBytes, byte[] destination, int destOffset) {
 		// We have to shift left 24 in order to flush out the 1's that appear
@@ -201,6 +202,7 @@ public static String encodeBytes(byte[] source, int off, int len) {
 	 *            the index where output will be put
 	 * @return the number of decoded bytes converted
 	 */
+	@SuppressWarnings("UnnecessaryParentheses")
 	private static int decode4to3(byte[] source, int srcOffset,
 			byte[] destination, int destOffset) {
 		// Example: Dk==

org.eclipse.jgit/src/org/eclipse/jgit/util/sha1/UbcCheck.java

@@ -89,6 +89,7 @@ final class UbcCheck {
 	private static final int DV_II_55_0_bit = 1 << 30;
 	private static final int DV_II_56_0_bit = 1 << 31;
 
+	@SuppressWarnings("UnnecessaryParentheses")
 	static int check(int[] w) {
 		int mask = ~0;
 		mask &= (((((w[44] ^ w[45]) >>> 29) & 1) - 1) | ~(DV_I_48_0_bit