Replace "sys.fuse_snapshot" with "persist.sys.fuse"

With the newly added flag for Settings developer options, which is now
used to change the state of FUSE, PROP_FUSE now acts as the snapshot
feature flag for the current boot.

Bug: 145391093
Test: atest AdoptableHostTest
Change-Id: I22363b088e88c764294cbd61c6d94160c907fae3
diff --git a/model/EmulatedVolume.cpp b/model/EmulatedVolume.cpp
index b42bd49..d1940f0 100644
--- a/model/EmulatedVolume.cpp
+++ b/model/EmulatedVolume.cpp
@@ -132,7 +132,7 @@
 
     dev_t before = GetDevice(mSdcardFsFull);
 
-    bool isFuse = base::GetBoolProperty(kPropFuseSnapshot, false);
+    bool isFuse = base::GetBoolProperty(kPropFuse, false);
 
     // Mount sdcardfs regardless of FUSE, since we need it to bind-mount on top of the
     // FUSE volume for various reasons.