vibrator: common: Check whether file is opened correctly

- Add compile-time type checking inside the has() function to ensure it
  receives the correct type.
- Add is_open() inside the has() function.

Bug: 350911314
Test: alarm, ringtone vibrations
Test: keyboard vibrations
Test: idlcli commands
Test: atest PTS, CTS, VTS
Flag: EXEMPT bugfix
Change-Id: Ifa8f197f6f4b25d51b2edaf6fec27a086bd4f73c

vibrator/cs40l26/Hardware.h

@@ -92,7 +92,7 @@ class HwApi : public Vibrator::HwApi, private HwApiBase {
     bool setRedc(std::string value) override { return set(value, &mRedc); }
     bool setQ(std::string value) override { return set(value, &mQ); }
     bool getEffectCount(uint32_t *value) override { return get(value, &mEffectCount); }
-    bool hasEffectBrakingTimeBank() override { return mEffectBrakingTimeBank.is_open(); }
+    bool hasEffectBrakingTimeBank() override { return has(mEffectBrakingTimeBank); }
     bool setEffectBrakingTimeBank(uint32_t value) override {
         return set(value, &mEffectBrakingTimeBank);
     }