Remove SkipMountingPartitions from vendor libfstab

SkipMountingPartitions() should only be called from a system process
as the config file is in /system_ext.
Remove it from the vendor variant of libfstab.

Bug: 158301941
Test: build hardware/interfaces/boot/1.1/default/boot_control and check symbol
Change-Id: I834183a623c0711dd79b89486fc3fc80f9710801
Merged-In: I834183a623c0711dd79b89486fc3fc80f9710801
(cherry picked from e7cb09d226)

fs_mgr/Android.bp

@@ -149,6 +149,14 @@ cc_library_static {
         darwin: {
             enabled: false,
         },
+        vendor: {
+            cflags: [
+                // Skipping entries in fstab should only be done in a system
+                // process as the config file is in /system_ext.
+                // Remove the op from the vendor variant.
+                "-DNO_SKIP_MOUNT",
+            ],
+        },
     },
     export_include_dirs: ["include_fstab"],
     header_libs: [

fs_mgr/fs_mgr_fstab.cpp

@@ -690,7 +690,9 @@ bool ReadFstabFromFile(const std::string& path, Fstab* fstab) {
         TransformFstabForDsu(fstab, Split(lp_names, ","));
     }
 
+#ifndef NO_SKIP_MOUNT
     SkipMountingPartitions(fstab);
+#endif
     EnableMandatoryFlags(fstab);
 
     return true;
@@ -720,11 +722,14 @@ bool ReadFstabFromDt(Fstab* fstab, bool log) {
         return false;
     }
 
+#ifndef NO_SKIP_MOUNT
     SkipMountingPartitions(fstab);
+#endif
 
     return true;
 }
 
+#ifndef NO_SKIP_MOUNT
 // For GSI to skip mounting /product and /system_ext, until there are well-defined interfaces
 // between them and /system. Otherwise, the GSI flashed on /system might not be able to work with
 // device-specific /product and /system_ext. skip_mount.cfg belongs to system_ext partition because
@@ -756,6 +761,7 @@ bool SkipMountingPartitions(Fstab* fstab) {
 
     return true;
 }
+#endif
 
 // Loads the fstab file and combines with fstab entries passed in from device tree.
 bool ReadDefaultFstab(Fstab* fstab) {