unwindstack: rename Memory::Read to ReadFully.

Rename Memory::Read to ReadFully to match its semantics with that of
android::base. ReadPartially will be renamed to Read in a follow up
commit, kept intentionally separate so that there aren't any callers
accidentally switched from ReadFully to Read.

Test: treehugger
Change-Id: I7d845ac5244c3025d92c8512e960e5d0d1da05af
diff --git a/libunwindstack/DwarfMemory.cpp b/libunwindstack/DwarfMemory.cpp
index 901f492..6ffdc0d 100644
--- a/libunwindstack/DwarfMemory.cpp
+++ b/libunwindstack/DwarfMemory.cpp
@@ -27,7 +27,7 @@
 namespace unwindstack {
 
 bool DwarfMemory::ReadBytes(void* dst, size_t num_bytes) {
-  if (!memory_->Read(cur_offset_, dst, num_bytes)) {
+  if (!memory_->ReadFully(cur_offset_, dst, num_bytes)) {
     return false;
   }
   cur_offset_ += num_bytes;