[LSC] Add LOCAL_LICENSE_KINDS to system/memory/lmkd

Added SPDX-license-identifier-Apache-2.0 to:
  Android.bp
  libpsi/Android.bp
  tests/Android.bp

Bug: 68860345
Bug: 151177513
Bug: 151953481

Test: m all

Exempt-From-Owner-Approval: janitorial work
Change-Id: I5fed190764c763388c50c2fea58c5c421579bd30

Android.bp

@@ -1,3 +1,7 @@
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
 cc_defaults {
     name: "stats_defaults",
     cflags: [

libpsi/Android.bp

@@ -1,3 +1,7 @@
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
 cc_library_headers {
     name: "libpsi_headers",
     export_include_dirs: ["include"],

tests/Android.bp

@@ -12,6 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
 cc_test {
     name: "lmkd_unit_test",