Enable generic JNI tests for MIPS32

We don't need to skip Generic JNI tests on MIPS32 since the original
issue has been fixed:
https://android-review.googlesource.com/#/q/topic:libjavacore_unload

Test: make test-art-target-gtest-jni_compiler_test on CI20

Change-Id: I98849ae2924ce886910c87f72813cb7a6465e8ad
diff --git a/compiler/jni/jni_compiler_test.cc b/compiler/jni/jni_compiler_test.cc
index b692c6d..82fcaf8 100644
--- a/compiler/jni/jni_compiler_test.cc
+++ b/compiler/jni/jni_compiler_test.cc
@@ -399,7 +399,6 @@
   TEST_F(JniCompilerTest, TestName ## NormalGeneric) { \
     SCOPED_TRACE("Normal JNI with generic");     \
     gCurrentJni = static_cast<uint32_t>(JniKind::kNormal); \
-    TEST_DISABLED_FOR_MIPS();                    \
     SetCheckGenericJni(true);                    \
     TestName ## Impl();                          \
   }
@@ -416,7 +415,6 @@
   TEST_F(JniCompilerTest, TestName ## FastGeneric) { \
     SCOPED_TRACE("@FastNative JNI with generic");  \
     gCurrentJni = static_cast<uint32_t>(JniKind::kFast); \
-    TEST_DISABLED_FOR_MIPS();                    \
     SetCheckGenericJni(true);                    \
     TestName ## Impl();                          \
   }