Revert "Drop max texture cache size from 12x to 5x"

Bug: 155002050
Test: Manual - scroll Pchome app

This reverts commit 05ac51641297ae2cbe9b186b8c369f3a23a156b9.

Reason for revert: When running Pchome, this change resulted in poor
performance while scrolling. Every frame appears to be uploading
several textures, potentially the same textures over and over again.

Change-Id: I0fc7216e16f783051d1bd87af764c1a6f361c138
diff --git a/libs/hwui/renderthread/CacheManager.cpp b/libs/hwui/renderthread/CacheManager.cpp
index d177855..1e58773 100644
--- a/libs/hwui/renderthread/CacheManager.cpp
+++ b/libs/hwui/renderthread/CacheManager.cpp
@@ -42,7 +42,7 @@
 // to the screen resolution. This is meant to be a conservative default based on
 // that analysis. The 4.0f is used because the default pixel format is assumed to
 // be ARGB_8888.
-#define SURFACE_SIZE_MULTIPLIER (5.0f * 4.0f)
+#define SURFACE_SIZE_MULTIPLIER (12.0f * 4.0f)
 #define BACKGROUND_RETENTION_PERCENTAGE (0.5f)
 
 CacheManager::CacheManager()