Add config to build mips with dsp2 optimizations enabled by default.

platform_tools/android/bin/android_setup.sh

 #!/bin/bash
 #
 # android_setup.sh: Sets environment variables used by other Android scripts.
 
 # Fail-fast if anything in the script fails.
 set -e
 
 BUILDTYPE=${BUILDTYPE-Debug}
 
 while (( "$#" )); do
@@ skipping 127 matching lines @@
       ;;
     arm64)
       DEFINES="${DEFINES} skia_arch_type=arm64 skia_arch_width=64"
       ANDROID_ARCH="arm64"
       ;;
     mips)
       DEFINES="${DEFINES} skia_arch_type=mips skia_arch_width=32"
       DEFINES="${DEFINES} skia_resource_cache_mb_limit=32"
       ANDROID_ARCH="mips"
       ;;
+    mips_dsp2)
+      DEFINES="${DEFINES} skia_arch_type=mips skia_arch_width=32"
+      DEFINES="${DEFINES} mips_arch_variant=mips32r2 mips_dsp=2"
+      ANDROID_ARCH="mips"
+      ;;
     mips64)
       DEFINES="${DEFINES} skia_arch_type=mips skia_arch_width=64"
       ANDROID_ARCH="mips64"
       ;;
     *)
       if [ -z "$ANDROID_IGNORE_UNKNOWN_DEVICE" ]; then
           echo "ERROR: unknown device $TARGET_DEVICE"
           exit 1
       fi
       # If ANDROID_IGNORE_UNKNOWN_DEVICE is set, then ANDROID_TOOLCHAIN
@@ skipping 99 matching lines @@
       adb_push_if_needed $HOST_SRC $ANDROID_DST
     else
       echo -n "$ANDROID_DST "
       $ADB $DEVICE_SERIAL shell mkdir -p "$(dirname "$ANDROID_DST")"
       $ADB $DEVICE_SERIAL push $HOST_SRC $ANDROID_DST
     fi
   fi
 }
 
 setup_device "${DEVICE_ID}"