hwc: Change error messages to informative messages in HWC

Few error messages in HWComposer change to as informative
messages.

Change-Id: Iecd2d6c129713363d338ca7aeefbcbc422df893d
diff --git a/libhwcomposer/hwc_mdpcomp.cpp b/libhwcomposer/hwc_mdpcomp.cpp
index bb52728..e535ccd 100644
--- a/libhwcomposer/hwc_mdpcomp.cpp
+++ b/libhwcomposer/hwc_mdpcomp.cpp
@@ -428,7 +428,7 @@
              * cropping */
             if((res_w != dst_w || res_h != dst_h) &&
                needsScaling (ctx, layer, mDpy)) {
-                ALOGE("%s: Resetting ROI due to scaling", __FUNCTION__);
+                ALOGI("%s: Resetting ROI due to scaling", __FUNCTION__);
                 memset(&mCurrentFrame.drop, 0, sizeof(mCurrentFrame.drop));
                 mCurrentFrame.dropCount = 0;
                 return false;
@@ -1137,7 +1137,7 @@
     //do not cache the information for next draw cycle.
     if(numLayers > MAX_NUM_APP_LAYERS) {
         mCachedFrame.updateCounts(mCurrentFrame);
-        ALOGE("%s: Number of App layers exceeded the limit ",
+        ALOGI("%s: Number of App layers exceeded the limit ",
         __FUNCTION__);
         ret = -1;
         return ret;