sm7125: fod: enable FOD in TSP in initialization

Samsung enables FOD in TS driver (fod_enable) at all times except
a small number of optical FOD sensor that doesn't have BiometricFeature
.FEATURE_SUPPORT_AOD. As optical type sensor support is not implemented
currently, this HAL is only used on device that has FOD always-on.

This change follows behavior of stock firmware and without toggling of
FOD enable state FOD should be more stable.

Plus it allows setInteractive and config_powerDecoupleInteractiveModeFromDisplay
to function properly with FOD. Currently setInteractive(0) happens before
a onShowFODView (which is the current point to call fod_enable) can be
triggered by the Doze, as TS driver only handles command when it is enabled,
FOD doesn't work when there is a setInteractive(0) that disables TS.

Signed-off-by: Michael Benedict <michaelbt@live.com>
Change-Id: If1ce9cab58717a9b9dcfce496da79bcf74773a33

fod/FingerprintInscreen.cpp

@@ -72,6 +72,7 @@ static hidl_vec<int8_t> stringToVec(const std::string& str) {
 FingerprintInscreen::FingerprintInscreen() {
     mSehBiometricsFingerprintService = ISehBiometricsFingerprint::getService();
     set(MASK_BRIGHTNESS_PATH, "319");
+    set(TSP_CMD_PATH, "fod_enable,1,1,0");
 }
 
 void FingerprintInscreen::requestResult(int, const hidl_vec<int8_t>&) {
@@ -87,7 +88,6 @@ Return<void> FingerprintInscreen::onFinishEnroll() {
 }
 
 Return<void> FingerprintInscreen::onPress() {
-    set(TSP_CMD_PATH, "fod_enable,1,1,0");
     mSehBiometricsFingerprintService->sehRequest(SEM_FINGER_STATE,
         SEM_PARAM_PRESSED, stringToVec(SEM_AOSP_FQNAME), FingerprintInscreen::requestResult);
     return Void();
@@ -96,7 +96,6 @@ Return<void> FingerprintInscreen::onPress() {
 Return<void> FingerprintInscreen::onRelease() {
     mSehBiometricsFingerprintService->sehRequest(SEM_FINGER_STATE, 
         SEM_PARAM_RELEASED, stringToVec(SEM_AOSP_FQNAME), FingerprintInscreen::requestResult);
-    set(TSP_CMD_PATH, "fod_enable,0");
     return Void();
 }
 
@@ -105,7 +104,6 @@ Return<void> FingerprintInscreen::onShowFODView() {
 }
 
 Return<void> FingerprintInscreen::onHideFODView() {
-    set(TSP_CMD_PATH, "fod_enable,0");
     return Void();
 }