[ErrorProne] Enable UnsafeReflectiveConstructionCast check (#37784)

Author: stankiewicz

buildSrc/src/main/groovy/org/apache/beam/gradle/BeamModulePlugin.groovy

@@ -1561,7 +1561,6 @@ class BeamModulePlugin implements Plugin<Project> {
             "UnnecessaryMethodReference",
             "UnnecessaryParentheses",
             "UnrecognisedJavadocTag",
-            "UnsafeReflectiveConstructionCast",
             // errorprone 3.2.0+ checks
             "DirectInvocationOnMock",
             "Finalize",

sdks/java/extensions/avro/src/test/java/org/apache/beam/sdk/extensions/avro/schemas/utils/AvroUtilsTest.java

@@ -92,17 +92,17 @@ private Iterable<?> randomData(org.apache.avro.Schema schema, int maxLength) thr
     Iterable<?> data;
     if (VERSION_AVRO.equals("1.8.2")) {
       data =
-          (Iterable<?>)
-              Class.forName("org.apache.avro.RandomData")
-                  .getDeclaredConstructor(org.apache.avro.Schema.class, Integer.TYPE)
-                  .newInstance(schema, maxLength);
+          Class.forName("org.apache.avro.RandomData")
+              .asSubclass(Iterable.class)
+              .getDeclaredConstructor(org.apache.avro.Schema.class, Integer.TYPE)
+              .newInstance(schema, maxLength);
     } else {
       data =
-          (Iterable<?>)
-              Class.forName("org.apache.avro.util.RandomData")
-                  .getDeclaredConstructor(org.apache.avro.Schema.class, Integer.TYPE, Boolean.TYPE)
-                  // force Utf8 in random data to match with String type used in AvroUtils
-                  .newInstance(schema, maxLength, true);
+          Class.forName("org.apache.avro.util.RandomData")
+              .asSubclass(Iterable.class)
+              .getDeclaredConstructor(org.apache.avro.Schema.class, Integer.TYPE, Boolean.TYPE)
+              // force Utf8 in random data to match with String type used in AvroUtils
+              .newInstance(schema, maxLength, true);
     }
     return data;
   }