incfs: fix uninitialized values

Clang's static analyzer is flagging uninitialized struct fields that
we're passing around. In particular, it's not happy that we pass this
partially-initialized struct to a pure-virtual method. I tend to agree
that this may cause issues.

Assuming zero-init gives us reasonable values for all of:

IncFsNewFileParams{}.verification.rootHash
IncFsNewFileParams{}.verification.additionalData
IncFsNewFileParams{}.verification.signature

Bug: None
Test: TreeHugger
Change-Id: I61e556cd8c0e68cdaebd50b0a7be5d5e0a4fd8ff
diff --git a/services/incremental/IncrementalService.cpp b/services/incremental/IncrementalService.cpp
index 3b51377..8012e74 100644
--- a/services/incremental/IncrementalService.cpp
+++ b/services/incremental/IncrementalService.cpp
@@ -1180,7 +1180,7 @@
         }
 
         // Create new lib file without signature info
-        incfs::NewFileParams libFileParams;
+        incfs::NewFileParams libFileParams{};
         libFileParams.size = uncompressedLen;
         libFileParams.verification.hashAlgorithm = INCFS_HASH_NONE;
         // Metadata of the new lib file is its relative path