Fix trivial warnings hidden by -isystem

Fix the trivial warnings that are hidden by the use of -isystem to
include frameworks/av and caught by -Werror.

Test: m -j checkbuild
Bug: 31751828
Change-Id: I155f9f772ce0a84b364313814cb7cf528b9de4eb
diff --git a/media/libmedia/MediaCodecInfo.cpp b/media/libmedia/MediaCodecInfo.cpp
index 62a7bdf..1f188f3 100644
--- a/media/libmedia/MediaCodecInfo.cpp
+++ b/media/libmedia/MediaCodecInfo.cpp
@@ -85,13 +85,13 @@
 }
 
 status_t MediaCodecInfo::Capabilities::writeToParcel(Parcel *parcel) const {
-    CHECK_LE(mProfileLevels.size(), INT32_MAX);
+    CHECK_LE(mProfileLevels.size(), static_cast<size_t>(INT32_MAX));
     parcel->writeInt32(mProfileLevels.size());
     for (size_t i = 0; i < mProfileLevels.size(); i++) {
         parcel->writeInt32(mProfileLevels.itemAt(i).mProfile);
         parcel->writeInt32(mProfileLevels.itemAt(i).mLevel);
     }
-    CHECK_LE(mColorFormats.size(), INT32_MAX);
+    CHECK_LE(mColorFormats.size(), static_cast<size_t>(INT32_MAX));
     parcel->writeInt32(mColorFormats.size());
     for (size_t i = 0; i < mColorFormats.size(); i++) {
         parcel->writeInt32(mColorFormats.itemAt(i));