config: reduce memory footprint

- add flag

Change-Id: Ifc84bbd8e4790ff0dab33368d9ac45158e7c47fc
Co-authored-by: Ghosuto <clash.raja10@gmail.com>
Signed-off-by: Ghosuto <clash.raja10@gmail.com>

config/common.mk

@@ -7,6 +7,12 @@ $(call inherit-product, vendor/google/overlays/ThemeIcons/config.mk)
 
 PRODUCT_BRAND ?= MistOS
 
+# Low ram profile
+TARGET_USE_LOWRAM_PROFILE ?= false
+ifeq ($(TARGET_USE_LOWRAM_PROFILE),true)
+    $(call inherit-product, vendor/lineage/config/defaults_common.mk)
+endif
+
 # Allow vendor prebuilt repos to exclude themselves from bp scanning
 -include $(sort $(wildcard vendor/*/*/exclude-bp.mk))
 

config/defaults_common.mk

@@ -0,0 +1,34 @@
+# Speed profile services and wifi-service to reduce RAM and storage.
+PRODUCT_SYSTEM_SERVER_COMPILER_FILTER := speed-profile
+PRODUCT_DEX_PREOPT_DEFAULT_COMPILER_FILTER := speed-profile
+
+# Do not generate libartd.
+PRODUCT_ART_TARGET_INCLUDE_DEBUG_BUILD := false
+
+# Strip the local variable table and the local variable type table to reduce
+# the size of the system image. This has no bearing on stack traces, but will
+# leave less information available via JDWP.
+PRODUCT_MINIMIZE_JAVA_DEBUG_INFO := true
+
+# Always preopt extracted APKs to prevent extracting out of the APK for gms
+# modules.
+PRODUCT_ALWAYS_PREOPT_EXTRACTED_APK := true
+
+# Use a profile based boot image for this device. Low ram optimized taken from atv devices.
+PRODUCT_USE_PROFILE_FOR_BOOT_IMAGE := true
+PRODUCT_COPY_FILES += vendor/lineage/product/lowram_boot_profiles/preloaded-classes:system/etc/preloaded-classes
+PRODUCT_DEX_PREOPT_BOOT_IMAGE_PROFILE_LOCATION := vendor/lineage/product/lowram_boot_profiles/boot-image-profile.txt
+
+PRODUCT_ARTIFACT_PATH_REQUIREMENT_ALLOWED_LIST += \
+system/etc/preloaded-classes.txt
+
+PRODUCT_PROPERTY_OVERRIDES += \
+    dalvik.vm.madvise.vdexfile.size=31457280\
+    dalvik.vm.madvise.odexfile.size=31457280\
+    dalvik.vm.madvise.artfile.size=0
+
+PRODUCT_PACKAGES += \
+    LowProfileOverlay
+
+TARGET_SYSTEM_PROP += \
+    vendor/lineage/config/defaults_common.prop

config/defaults_common.prop

@@ -0,0 +1,18 @@
+# Set lowram options
+ro.lmk.critical_upgrade=true
+ro.lmk.upgrade_pressure=40
+ro.lmk.downgrade_pressure=60
+ro.lmk.kill_heaviest_task=false
+ro.lmk.medium=700
+
+# set threshold to filter unused apps
+pm.dexopt.downgrade_after_inactive_days=10
+
+# Default heap sizes. Allow up to 256m for large heaps to make sure a single app
+# doesn't take all of the RAM.
+dalvik.vm.heapgrowthlimit=128m
+dalvik.vm.heapsize=256m
+dalvik.vm.madvise-random=true
+
+# disable machine learning
+ro.nnapi.extensions.deny_on_product=true

overlay/LowProfileOverlay/Android.bp

@@ -0,0 +1,6 @@
+runtime_resource_overlay {
+    name: "LowProfileOverlay",
+    certificate: "platform",
+    sdk_version: "current",
+    product_specific: true
+}

overlay/LowProfileOverlay/AndroidManifest.xml

@@ -0,0 +1,6 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="android.overlay.lowram.target.overlay">
+    <overlay android:isStatic="true" android:priority="600" android:targetName="LowProfileOverlay" android:targetPackage="android"/>
+
+    <application android:hasCode="false" android:label="LowProfileOverlay"/>
+</manifest>

overlay/LowProfileOverlay/res/values/config.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2024-2025 Lunaris OS
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<resources>
+    <!-- The amount to scale fullscreen snapshots for Overview and snapshot starting windows. -->
+    <item name="config_highResTaskSnapshotScale" format="float" type="dimen">0.6</item>
+</resources>