Refactor space bitmap to support different alignments.

Required for:
Using space bitmaps instead of std::set in mod union table +
remembered set.
Using a bitmap instead of set for large object marking.

Bug: 13571028

Change-Id: Id024e9563d4ca4278f79607cdb2f81895121b113
diff --git a/runtime/gc/space/image_space.cc b/runtime/gc/space/image_space.cc
index faa539f..91d8820 100644
--- a/runtime/gc/space/image_space.cc
+++ b/runtime/gc/space/image_space.cc
@@ -35,7 +35,7 @@
 Atomic<uint32_t> ImageSpace::bitmap_index_(0);
 
 ImageSpace::ImageSpace(const std::string& name, MemMap* mem_map,
-                       accounting::SpaceBitmap* live_bitmap)
+                       accounting::ContinuousSpaceBitmap* live_bitmap)
     : MemMapSpace(name, mem_map, mem_map->Begin(), mem_map->End(), mem_map->End(),
                   kGcRetentionPolicyNeverCollect) {
   DCHECK(live_bitmap != nullptr);
@@ -197,10 +197,10 @@
   uint32_t bitmap_index = bitmap_index_.FetchAndAdd(1);
   std::string bitmap_name(StringPrintf("imagespace %s live-bitmap %u", image_file_name,
                                        bitmap_index));
-  UniquePtr<accounting::SpaceBitmap> bitmap(
-      accounting::SpaceBitmap::CreateFromMemMap(bitmap_name, image_map.release(),
-                                                reinterpret_cast<byte*>(map->Begin()),
-                                                map->Size()));
+  UniquePtr<accounting::ContinuousSpaceBitmap> bitmap(
+      accounting::ContinuousSpaceBitmap::CreateFromMemMap(bitmap_name, image_map.release(),
+                                                          reinterpret_cast<byte*>(map->Begin()),
+                                                          map->Size()));
   if (bitmap.get() == nullptr) {
     *error_msg = StringPrintf("Could not create bitmap '%s'", bitmap_name.c_str());
     return nullptr;