Size optimization: Build rootfs with forked adb recipe so it only ins…

…talls adbd in the target image.

Readd diag user just in case

tools/config/poky/rootfs.conf

@@ -277,7 +277,7 @@ PACKAGECONFIG_append_pn-qemu-system-native = " sdl"
 CONF_VERSION = "1"
 
 # ADB Support 
-CORE_IMAGE_EXTRA_INSTALL += "android-tools "
+CORE_IMAGE_EXTRA_INSTALL += "android-tools-adb "
 
 # Common scripts (set diag permissions, mount partitions etc.)
 CORE_IMAGE_EXTRA_INSTALL += "shared-scripts "
@@ -306,6 +306,9 @@ CORE_IMAGE_EXTRA_INSTALL += "kernel-modules "
 INHERIT += "extrausers"
 INHERIT += "recipe_sanity"
 
+EXTRA_USERS_PARAMS+= "groupadd -g 53 diag; "
+EXTRA_USERS_PARAMS+= "useradd -r -u 53 -g 53 -m -c 'diag' -d /nonexistent -s /bin/false diag; "
+
 VIRTUAL-RUNTIME_dev_manager ?= "busybox-mdev"
 DISTRO_FEATURES += "sysvinit eabi ipv6 ipv4 largefile thumb-interwork xattr ${MICRO_GOLD} ${DISTRO_FEATURES_LIBC}"
 USE_DEVFS = "0"