VTSHalPowerTarget.FMQAidl: Make sure session status OK before running test

While PowerHal version >= 5 but devices didn't support HintSession. We should skip the test. Otherwise, it would fail.

Change-Id: I0f757ab825020ded02c31231969e13f3375e47f3
Test: atest VTSHalPowerTarget
Bug: 328330332
diff --git a/power/aidl/vts/VtsHalPowerTargetTest.cpp b/power/aidl/vts/VtsHalPowerTargetTest.cpp
index 939deb2..272674f 100644
--- a/power/aidl/vts/VtsHalPowerTargetTest.cpp
+++ b/power/aidl/vts/VtsHalPowerTargetTest.cpp
@@ -159,7 +159,10 @@
         auto status =
                 power->createHintSessionWithConfig(getpid(), getuid(), kSelfTids, 16666666L,
                                                    SessionTag::OTHER, &mSessionConfig, &mSession);
-        ASSERT_TRUE(status.isOk());
+        mSessionSupport = status.isOk();
+        if (!mSessionSupport) {
+            GTEST_SKIP() << "DEVICE not support Hint Session.";
+        }
         ASSERT_NE(nullptr, mSession);
 
         status = power->getSessionChannel(getpid(), getuid(), &mChannelConfig);