Get rid of confusing FUSE variables and comments.

Long before scoped storage, FUSE was used to create several views of the
filesystem; this was later replaced by sdcardfs, yet the code still
references FUSE in variables and log messages. Fix those up to avoid
confusion with the "new FUSE".

Bug: 135341433
Test: atest AdoptableHostTest
Change-Id: I2966c5f95d6f38df36a20cdfdd0b95b3051f3f1e
diff --git a/model/PublicVolume.h b/model/PublicVolume.h
index 2feccca..a9bc1ab 100644
--- a/model/PublicVolume.h
+++ b/model/PublicVolume.h
@@ -27,7 +27,7 @@
 /*
  * Shared storage provided by public (vfat) partition.
  *
- * Knows how to mount itself and then spawn a FUSE daemon to synthesize
+ * Knows how to mount itself and then spawn a sdcardfs daemon to synthesize
  * permissions.  AsecVolume and ObbVolume can be stacked above it.
  *
  * This volume is not inherently multi-user aware, so it has two possible
@@ -60,13 +60,10 @@
     /* Mount point of raw partition */
     std::string mRawPath;
 
-    std::string mFuseDefault;
-    std::string mFuseRead;
-    std::string mFuseWrite;
-    std::string mFuseFull;
-
-    /* PID of FUSE wrapper */
-    pid_t mFusePid;
+    std::string mSdcardFsDefault;
+    std::string mSdcardFsRead;
+    std::string mSdcardFsWrite;
+    std::string mSdcardFsFull;
 
     /* Filesystem type */
     std::string mFsType;