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/Memory.cpp b/libunwindstack/Memory.cpp
index f27a350..1f4cd03 100644
--- a/libunwindstack/Memory.cpp
+++ b/libunwindstack/Memory.cpp
@@ -84,7 +84,7 @@
 
 namespace unwindstack {
 
-bool Memory::Read(uint64_t addr, void* dst, size_t size) {
+bool Memory::ReadFully(uint64_t addr, void* dst, size_t size) {
   size_t rc = ReadPartially(addr, dst, size);
   return rc == size;
 }
@@ -94,7 +94,7 @@
   uint64_t bytes_read = 0;
   while (bytes_read < max_read) {
     uint8_t value;
-    if (!Read(addr, &value, sizeof(value))) {
+    if (!ReadFully(addr, &value, sizeof(value))) {
       return false;
     }
     if (value == '\0') {
@@ -237,7 +237,7 @@
 
   // The first uint64_t value is the start of memory.
   uint64_t start;
-  if (!memory_file->Read(0, &start, sizeof(start))) {
+  if (!memory_file->ReadFully(0, &start, sizeof(start))) {
     return false;
   }