Make IcuTestFmwkRunner public so can be created using reflection

Minor code simplification as suggested by IDEA.

(cherry picked from commit 20ffdaa18feec3a1373d355d1bc5acae357e633b)

Bug: 22023363
Change-Id: I11029b74c924986317569c1a17bb81a560286987
diff --git a/android_icu4j/runner/src/main/java/android/icu/junit/IcuTestFmwkRunner.java b/android_icu4j/runner/src/main/java/android/icu/junit/IcuTestFmwkRunner.java
index 6f5e436..965ff1d 100644
--- a/android_icu4j/runner/src/main/java/android/icu/junit/IcuTestFmwkRunner.java
+++ b/android_icu4j/runner/src/main/java/android/icu/junit/IcuTestFmwkRunner.java
@@ -72,11 +72,12 @@
         return testClass.asSubclass(TestFmwk.class);
     }
 
-    IcuTestFmwkRunner(Class<? extends TestFmwk> testFmwkClass, AndroidRunnerParams runnerParams)
+    public IcuTestFmwkRunner(Class<? extends TestFmwk> testFmwkClass,
+            AndroidRunnerParams runnerParams)
             throws Exception {
         super(testFmwkClass);
 
-        this.skipExecution = runnerParams == null ? false : runnerParams.isSkipExecution();
+        this.skipExecution = runnerParams != null && runnerParams.isSkipExecution();
 
         // Create a TestFmwk and make sure that it's initialized properly.
         TestFmwk testFmwk = TestFmwkUtils.newTestFmwkInstance(testFmwkClass);